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Departments of Obstetrics and Gynecology (R.A., K.S.W., R.R., E.S.K.), Medicine (R.A.), and Occupational Health and Safety (T.J.K.), The University of Alabama at Birmingham, Birmingham, Alabama 35233; and Department of Internal Medicine (B.O.Y.), Endocrinology and Metabolism Unit, Hacettepe University Faculty of Medicine, Ankara, Turkey, 06100
Address all correspondence and requests for reprints to: Ricardo Azziz, M.D., M.P.H., M.B.A., Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, 8635 West Third Street, Suite 160 W, Los Angeles, California 90048. E-mail: azzizr{at}cshs.org.
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Abstract |
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6), and 3) the exclusion of related disorders. Confirmed PCOS was established in those individuals whose evaluation was complete and indicative of PCOS, and possible PCOS was established when the hormonal evaluation was not complete or was unavailable, but the clinical phenotype was otherwise suggestive of the disorder. The individual probability of PCOS in women with possible PCOS was assigned a weight based on the findings in similar subjects whose evaluation was complete, and the total number of PCOS cases arising from these individuals was calculated (i.e. individual probability of PCOS x total number of subjects in the group). The cumulative prevalence of PCOS in our population was 6.6% (26.5 of 400), including 15 subjects among the 347 women completing their evaluation and a calculated prevalence of 11.5 subjects among the remainder. The prevalence rates of PCOS for Black and White women were 8.0 and 4.8%, respectively, not significantly different. These data from a large representative unselected population support the concept that PCOS is the most common endocrine abnormality of reproductive-aged women in the United States. |
Introduction |
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TopAbstractIntroductionSubjects and MethodsResultsDiscussionReferences |
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For research purposes, many investigators define PCOS using the recommendations of a conference sponsored by the National Institutes of Health (NIH)/National Institute of Child Health and Human Development in April 1990 (7). The conference concluded that PCOS should be defined by the following (in order of importance): 1) hyperandrogenism and/or hyperandrogenemia, 2) ovulatory dysfunction, and 3) exclusion of related disorders such as hyperprolactinemia, thyroid disorders, and nonclassical adrenal hyperplasia (NCAH).
Notwithstanding its significant public health impact and associated reproductive, endocrine, and metabolic implications, estimates regarding the prevalence of PCOS are limited and unclear. We previously reported a prevalence of 4.0% among 277 unselected women of reproductive age (18–45 yr of age) seeking a preemployment physical, 4.7% among White and 3.4% among Black women (8). However, three studies from Europe have suggested prevalence rates 60–100% higher. Studying 192 random women recruited through the offer of a free medical examination on the island of Lesbos, Greece, Diamanti-Kandarakis et al. (9) reported a 6.8% prevalence of PCOS. In this study, women who were receiving hormonal medications were excluded. In another study, 230 women aged 18–25 yr were recruited from two universities and two general practice surgeries in Oxford, United Kingdom via a letter and information sheets for participation in "a study of women’s health issues" (10). In this study, the prevalence of PCOS, endocrinologically defined, was 8%. Among 154 White women in Madrid, Spain reporting spontaneously for blood donation, 6.5% were found to have PCOS (11).
The recruitment process of the study population can significantly impact the characteristics and prevalence of the disorder under study (12, 13, 14). Unfortunately, two of the four currently available studies determining the prevalence of PCOS based their estimates on subjects recruited through the promise of a health evaluation (9, 10), potentially biasing the population toward disease-carrying individuals. The objective of the present study was to determine the prevalence of PCOS in a well-defined population of unselected reproductive-aged women in the United States, aiming to evaluate a large number of subjects and perform a complete phenotyping of the women involved. Secondarily, the impact of race (Black vs. White) on the prevalence of the disorder was determined.
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Subjects and Methods |
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All prospective employees of the University of Alabama at Birmingham (UAB), from resident staff to environmental workers, undergo an entrance medical evaluation that includes a brief history and physical and blood sampling. It should be noted that UAB is the single largest employer in the city of Birmingham and the third-largest employer in the state of Alabama, and its employees represent a cross-section of the population. Between July 1, 1998 and October 31, 1999, all consecutive premenopausal females, ages 18–45 yr, who were to undergo a preemployment physical examination were asked to participate. The study was approved by the Institutional Review Board of UAB, and all subjects entered gave written consent. None of the subjects in the present study have been previously reported on because our previous report included women recruited between March 1, 1996 and July 30, 1997 (8).
To minimize treatment bias, we included all women regardless of hormonal therapy, including oral contraceptive pills or continuous progestin, glucocorticoid, or insulin sensitizer therapy. This is particularly important because PCOS may predispose patients to the use of hormonal therapy. We excluded women younger than 18 yr of age or older than 45 yr of age, menopausal women, women who have undergone a previous hysterectomy or bilateral oophorectomy, and women who were pregnant at the time of the evaluation. Women with a diagnosis of hypothyroidism who were receiving adequate thyroid hormone replacement were included in the study.
All study subjects with abnormal findings were notified of the results of their evaluation, and those individuals with abnormal physical, historical, or biochemical findings were encouraged to undergo further investigation and/or therapy.
Study protocol
A standardized history form was completed, with emphasis on menstrual dating and regularity, hirsutism and acne, gynecological history, medications, and family history. Patients on hormonal therapy were questioned regarding their menstrual cyclicity before they started the medications. The amount of excess terminal hair growth was first assessed using a previously described modified Ferriman-Gallwey (mF-G) method, scoring the presence of terminal hairs over nine body areas (i.e. upper lip, chin, chest, upper and lower abdomen, thighs, upper and lower back, and upper arms) from 0 to 4 (14A ). To maximize the accuracy of hirsutism scoring, subjects with an initial mF-G score more than 3 per the study nurse were reexamined by a single physician (E.S.K.). The presence of acne was also recorded, although no specific scoring system was applied. Blood was obtained for subsequent hormonal analysis. Serum was stored at –70 C until assayed.
For evaluation purposes, subjects were subdivided according to the presence or absence of menstrual dysfunction and hirsutism into four groups: 1) no hirsutism or menstrual dysfunction, 2) menstrual dysfunction only, 3) hirsutism only, and 4) menstrual dysfunction and hirsutism. The evaluation in each of these groups was planned as follows:
1) Subjects determined to have no hirsutism or menstrual dysfunction by the history and physical examination were not further evaluated and were deemed to not have PCOS.
2) In women with menstrual dysfunction only, serum was obtained for the evaluation of total and free testosterone (T), androstenedione (A4), and dehydroepiandrosterone sulfate (DHEAS); if any of these was abnormal, the levels of prolactin and 17-hydroxyprogesterone (17-HP) were also assessed to exclude hyperprolactinemia and 21-hydroxylase (21-OH)-deficient NCAH, respectively.
3) In women with hirsutism only, serum was obtained on d 22–24 of the cycle for the measurement of progesterone (P4) to confirm ovulatory function; if the P4 level was less than 4 ng/ml, indicating anovulation, prolactin and 17-HP levels were determined.
4) In women with menstrual dysfunction and hirsutism, serum was obtained for the measurement of prolactin and 17-HP levels.
Any subject with a 17-HP level more than 2 ng/ml underwent an acute adrenal stimulation test, measuring 17-HP levels before and 60 min after the iv administration of 0.25 mg ACTH-(1–24) to exclude or diagnose 21-hydroxylase; 21-OH-deficient NCAH, as previously described (15). We should note that androgen levels were not assessed in subjects receiving hormonal therapy.
Defining the presence of PCOS
The presence of PCOS in these unselected women was defined by the presence of ovulatory dysfunction and clinical hyperandrogenism (i.e. hirsutism) and/or hyperandrogenemia—and the exclusion of other known disorders, as previously described (8). Specifically, the individual criterion are as follows:
1) Ovulatory dysfunction. Ovulatory dysfunction was surmised by a history of eight or fewer menstrual cycles in a year, or menstrual cycles less than 26 d or more than 35 d in length; or a d 22–24 (midluteal) P4 level of less than 4 ng/ml in subjects with cycles 26–35 d in length.
2) Clinical hyperandrogenism.
Clinical hyperandrogenism was diagnosed by the presence of hirsutism (i.e. mF-G score 6, see above).
3) Hyperandrogenemia. Hyperandrogenemia was defined as a total and/or free T, A4, and/or DHEAS level above the upper 95th percentile of 98 healthy nonhirsute eumenorrheic women, as previously reported (8). Specifically, the upper normal limits were total T = 84.7 ng/dl (2.94 nmol/liter), free T = 0.75 ng/dl (0.026 nmol/liter), A4 = 2496 pg/ml (8.73 nmol/liter), and DHEAS = 2459 ng/ml (6.64 µmol/liter).
4) Exclusion of related disorders. After initial examination (and reexamination) and hormonal analysis, all subjects who potentially had PCOS (i.e. oligoovulation with hirsutism, and/or hyperandrogenemia) had their serum sample further analyzed to exclude hyperprolactinemia and 21-OH-deficient NCAH, respectively. Serum TSH levels were not checked systematically in all subjects unless the subject had clinical symptoms suggestive of thyroid dysfunction or was currently on thyroid replacement. Twenty-four-hour urine free cortisol levels were measured if the subject had possible clinical features of hypercortisolemia.
Confirmed PCOS was established in those individuals whose evaluation was complete and met the criteria described above. Possible PCOS was defined when the evaluation was not complete or was unavailable, but the clinical phenotype was otherwise suggestive of the disorder. The individual probability of PCOS in women with possible PCOS was assigned a weight based on the findings in similar subjects whose evaluation was complete (i.e. number of confirmed PCOS in category/number of patients with complete evaluation). The total number of PCOS cases arising from these individuals was then calculated (i.e. individual probability of PCOS x total number of subjects in group).
Hormonal analysis
As indicated, serum samples were analyzed for total T, SHBG, DHEAS, A4, prolactin, TSH, 17-HP, and P4. Total T was measured by an in-house RIA method after serum extraction, as previously described (16). SHBG activity was measured by diffusion equilibrium dialysis, using Sephadex G-25 (Sigma-Aldrich Corp., St. Louis, MO) and [3H]T as the ligand, and the free T was calculated as previously described (13). DHEAS, P4, A4, PRL, and 17-HP were measured by direct RIA using commercially available kits (DHEAS and P4 from Diagnostic Products Corp., Los Angeles, CA; A4 from Diagnostics Systems Laboratories, Webster, TX; and PRL from Nichols Institute Diagnostics, San Juan Capistrano, CA) as previously described (17, 18).
Samples were batched at regular intervals for analysis to minimize the impact of interassay variability while providing study subjects with timely information. The intra- and interassay variations for total T, SHBG, DHEAS, A4, PRL, TSH, 17-HP, and P4 have been previously reported (8).
Statistical analysis
All parameters were given as mean ± SD. Student’s t test and 
2 test were used when appropriate. P <0.05 was considered statistically significant. Data analysis was performed using the SPSS 9.0 PC package (SPSS Inc., Chicago, IL).
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Results |
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Between July 1, 1998 and October 31, 1999, 608 unselected consecutive premenopausal women at ages 18–45 yr seeking a preemployment physical at the UAB were invited to participate. Of these, eight were excluded due to either pregnancy or menopause, and 200 (33%) refused to participate, yielding a total of 400 subjects (66% of screened) available for study (223 Black, 166 White, 11 of other races). The 208 women who were excluded due to pregnancy or menopause or refusal to participate in the study did not differ from the 400 women agreeing to enter the study in racial composition (57% Black vs. 56% Black, respectively) or body mass index (BMI) (27.5 ± 6.6 kg/m2 vs. 27.8 ± 7.7 kg/m2 respectively), although they did slightly differ in mean age (31.2 ± 7.7 vs. 29.1 ± 7.2 yr, respectively; P < 0.01).
Of the 400 women included in the study, 24% were overweight (BMI, 25.0–29.9 kg/m2), and 32% were obese (BMI 30.0 kg/m2). Overweight and obesity prevalence rates for Black and White women were 25 and 42%, and 21 and 19%, respectively, a significant difference (2 = 9.00; P < 0.004). One hundred forty women (35%) were receiving hormonal therapy; 60% of these women were taking the medications primarily for contraceptive purposes.
Prevalence of menstrual dysfunction, hirsutism, and PCOS
The overall prevalence of menstrual dysfunction and hirsutism was 22.8% (91/400) and 6.8% (27/400), respectively. The prevalence rates of menstrual dysfunction in Black and White women were 25.1 and 20.5%, respectively (2 = 0.6; P > 0.05). Hirsutism was found in 8.1% of Black and 5.4% of White women (2 = 0.57; P > 0.05). Two of the 400 women included in the study were found to have undiagnosed hypothyroidism, and nine were already receiving thyroid hormone replacement for a total prevalence of hypothyroidism (diagnosed and undiagnosed) of 2.7% in our sample population. None of the patients had features suggestive of hypercortisolemia or were diagnosed with NCAH or hyperprolactinemia. A total of 86.7% (347 of 400) of subjects completed their evaluation (Table 1
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1) Women without menstrual dysfunction or hirsutism.
Of the 400 women studied, 293 were found to be nonhirsute and eumenorrheic, effectively excluding PCOS (Table 1
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2) Women with menstrual dysfunction only.
Eighty women (20% of the total) had menstrual dysfunction without hirsutism (Table 1). Thirty-eight subjects had complete evaluations, and three of these had confirmed PCOS. The remaining 42 individuals with incomplete evaluations were designated as having possible PCOS. Their individual probability of PCOS was 0.08 (i.e. 3 of 38 in the group completing evaluation), and the total number of additional PCOS cases from this group was 3.4 (i.e. 0.08 x 42). The prevalence of PCOS in this phenotype was 8% (6.4 of 80).
3) Women with hirsutism only.
Sixteen subjects had hirsutism in the absence of menstrual dysfunction (i.e. hirsute only), of which nine had a complete evaluation with six of these having confirmed PCOS (Table 1). The remaining seven hirsute-only women had possible PCOS, with an individual probability of PCOS of 0.67 (6 of 9) and a total of 4.7 (0.67 x 7) additional PCOS cases. The prevalence of PCOS in this group was 67% (10.7 of 16).
4) Women with menstrual dysfunction and hirsutism.
Eleven women had menstrual dysfunction and hirsutism, seven of which had a complete evaluation with six having confirmed PCOS (Table 1). One subject was found to have an elevated TSH level (20.0 mIU/liter) but did not return for further testing or reassessment after therapy and, consequently, could not be properly designated as having PCOS. The remaining four also were designated as having possible PCOS, with an individual probability of PCOS of 0.86 (6 of 7), and a total number of additional PCOS cases of 3.4 (0.86 x 4). The prevalence of PCOS in this phenotypic group was 85% (9.4 of 11).
Overall prevalence and characteristics of PCOS patients diagnosed in unselected reproductive-aged women
The cumulative number of PCOS subjects in the study population included 15 subjects among 347 women completing their evaluation, and 11.5 subjects among the remainder, with a cumulative prevalence of 6.6% (i.e. 26.5 of 400). Eighteen (8.0%) of the 223 Black women studied and eight (4.8%) of the 166 White women studied were classified as having PCOS, a difference that was not statistically significant (2 = 1.61; P > 0.05). The prevalence of overweightness (BMI, 25.0–29.9 kg/m2) in PCOS was 24% and similar to that of the general population; alternatively, the prevalence of obesity (BMI 30.0 kg/m2) in these patients was 42%, significantly higher than that of the overall population under study (2 = 35.91; P < 0.001).
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Discussion |
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The prevalence rate of reported menstrual dysfunction in our population was 22.8%, very similar to the rate of 22.9% reported by 101,073 women participating in the Nurses’ Health Study II for cycles 32 d or more in length (19). The prevalence of menstrual disorders was also similar to that observed in the studies of PCOS prevalence in Greece and Spain (9, 11). Alternatively, we observed an overall hirsutism rate of 6.8%, higher than the 2.4% rate of physician-diagnosed hirsutism reported by the participants of the Nurses’ Health Study II (19). The lower rate reported in the latter study is consistent with the fact that many hirsute women do not seek physician evaluation (20), either because they are ignorant of the medical etiology of this cosmetic anomaly or, less likely, because they find hirsutism personally not distressing. Alternatively, the prevalence of hirsutism in our study was similar to that observed in a smaller population of Spanish women seeking to voluntarily donate blood (7.1%), but lower than that observed in a study on the Greek island of Lesbos (29%). The higher rate observed in this latter study may reflect ethnic differences or may be due to selection bias because these women were responding to an offer of a free medical evaluation.
In our population, 74% of women with hirsutism were estimated to suffer from PCOS, and 76% (20.1 of 26.5) of women diagnosed with PCOS demonstrated hirsutism, consistent with our findings in studies of women seeking care for hirsutism (20). We should note that the prevalence of hirsutism in PCOS varies by ethnicity. In comparative studies, the rate of hirsutism in Japanese patients was lower than in Hispanic and Italian women living in the United States (21). Alternatively, the prevalence of hirsutism was higher among South Asian patients living in the United Kingdom, compared with PCOS women of European descent living in the same locale (22). In the present study, there was no difference in the prevalence of hirsutism between Black and White patients with PCOS.
In our overall study population, 24% of subjects were overweight, and 32% were obese, a rate that was higher among Black than White patients. These rates are similar to those observed in the 1999–2000 National Health and Nutrition Examination Survey in similarly aged U.S. women (23). The prevalence of obesity, but not overweightness, was higher in PCOS women than in our overall study population (i.e. 42%) and higher than Spanish patients similarly identified (i.e. 30%) (11). However, the prevalence of obesity in our PCOS patients was similar to the rate observed in Greek women (i.e. 38%) (9). These data suggest that there are significant ethnic differences in the prevalence of obesity in PCOS and that obesity per se is not a universal feature of the syndrome.
We have tried to minimize selection bias in the inclusion of subjects in this study. All subjects were undergoing a mandated preemployment physical examination, which includes all medical, nursing, clerical, and support staff seeking employment at UAB. Furthermore, racial and socioeconomic bias is minimized because UAB is the single largest employer in the city of Birmingham. Nonetheless, a few potential confounders remain. First, it is possible that the prevalence of PCOS may have varied if we had been able to include all those women refusing to participate (33%), although we have no evidence of a significant difference between those women agreeing and those refusing to participate. Second, it may be argued that it is possible that we underestimated the prevalence of PCOS when we assumed that those women presenting with regular menstrual function and without hirsutism did not have PCOS. However, a recent report evaluating 550 consecutive couples seeking pregnancy indicated that only 3.7% of eumenorrheic women had anovulation (24). Hence, it is likely that few, if any, patients with PCOS were present in the population of eumenorrheic nonhirsute women.
Most importantly, our study design may have biased against the diagnosis of PCOS because a negative evaluation was easier to complete than a positive one. For example, in the case of the patient with eumenorrhea and no hirsutism, only the completion of a history and physical examination was required. Alternatively, the diagnosis of confirmed PCOS required that all blood testing be completed, possibly including returning for a midluteal P4 level and/or an acute ACTH stimulation test. Hence, individuals not completing their evaluation, but whose phenotypes were suggestive of PCOS, were assigned a weighted prevalence value based on findings in similar subjects whose evaluation was complete.
Finally, we should note that a recent conference on the subject cosponsored by the European Society for Human Reproduction and Embryology and the American Society for Reproductive Medicine was held May 1–3, 2003, in Rotterdam, The Netherlands. Conference participants suggested that the diagnostic criteria for PCOS be revised such that the disorder would be diagnosable if two of the following three criteria were present, after the exclusion of other etiologies: 1) oligo- and/or anovulation, 2) clinical and/or biochemical signs of hyperandrogenism, and 3) polycystic ovaries on ultrasonography (25, 26). The definition used in the current study is consistent with those proposed in Rotterdam. Nonetheless, per this newer definition, we may have further underestimated the prevalence of PCOS because our subjects did not undergo transvaginal sonography, and hence, we did not identify two additional potential phenotypes, i.e. women solely with oligoovulation and polycystic ovaries, or with hyperandrogenism and polycystic ovaries but normal ovulation.
We conclude that the estimated prevalence of endocrinologically defined PCOS in an unselected population of reproductive-aged women in the United States is 6.6%. This prevalence is higher than our previous estimate studying a smaller population of unselected women (8) and consistent with studies in random women seeking a free physical examination on the island of Lesbos, Greece (9) and in female blood donors in Madrid, Spain (11). Although PCOS is a complex heterogeneous disorder presenting with a spectrum of diverse phenotypes, it seems likely that even in different populations with varying genotypic and phenotypic characteristics, agreement on the definition of the syndrome eliminates an important source of variation in prevalence estimates and gives rise to consistent results. Among the PCOS patients diagnosed from our general population, approximately 75% were hirsute and 42% were obese. There did not appear to be a significant phenotypic difference between Black and White women with PCOS. Overall, PCOS is one of the most common and important endocrine abnormalities of women.
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Footnotes |
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Abbreviations: A4, Androstenedione; BMI, body mass index; DHEAS, dehydroepiandrosterone sulfate; 21-OH, 21-hydroxylase; 17-HP, 17-hydroxyprogesterone; mF-G, modified Ferriman-Gallwey; NCAH, nonclassical adrenal hyperplasia; PCOS, polycystic ovary syndrome; T, testosterone.
Received November 24, 2003.
Accepted February 23, 2004.
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S. E. Recabarren, T. Sir-Petermann, R. Rios, M. Maliqueo, B. Echiburu, R. Smith, P. Rojas-Garcia, M. Recabarren, and R. A. Rey Pituitary and Testicular Function in Sons of Women with Polycystic Ovary Syndrome from Infancy to Adulthood J. Clin. Endocrinol. Metab., September 1, 2008; 93(9): 3318 - 3324. [Abstract] [Full Text] [PDF]
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M. Das, D.J. Gillott, E. Saridogan, and O. Djahanbakhch Anti-Mullerian hormone is increased in follicular fluid from unstimulated ovaries in women with polycystic ovary syndrome Hum. Reprod., September 1, 2008; 23(9): 2122 - 2126. [Abstract] [Full Text] [PDF]
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S. Tan, S. Hahn, S. Benson, O.E. Janssen, T. Dietz, R. Kimmig, J. Hesse-Hussain, K. Mann, M. Schedlowski, P.C. Arck, et al. Psychological implications of infertility in women with polycystic ovary syndrome Hum. Reprod., September 1, 2008; 23(9): 2064 - 2071. [Abstract] [Full Text] [PDF]
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S. J. Chae, J. J. Kim, Y. M. Choi, K. R. Hwang, B. C. Jee, S. Y. Ku, C. S. Suh, S. H. Kim, J. G. Kim, and S. Y. Moon Clinical and biochemical characteristics of polycystic ovary syndrome in Korean women Hum. Reprod., August 1, 2008; 23(8): 1924 - 1931. [Abstract] [Full Text] [PDF]
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M. O. Goodarzi, N. Xu, and R. Azziz Association of CYP3A7*1C and Serum Dehydroepiandrosterone Sulfate Levels in Women with Polycystic Ovary Syndrome J. Clin. Endocrinol. Metab., July 1, 2008; 93(7): 2909 - 2912. [Abstract] [Full Text] [PDF]
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M. Luque-Ramirez, F. Alvarez-Blasco, M. G. Uriol Rivera, and H. F. Escobar-Morreale Serum uric acid concentration as non-classic cardiovascular risk factor in women with polycystic ovary syndrome: effect of treatment with ethinyl-estradiol plus cyproterone acetate versus metformin Hum. Reprod., July 1, 2008; 23(7): 1594 - 1601. [Abstract] [Full Text] [PDF]
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 D. H Abbott, D. K Barnett, J. E Levine, V. Padmanabhan, D. A Dumesic, S. Jacoris, and A. F Tarantal Endocrine Antecedents of Polycystic Ovary Syndrome in Fetal and Infant Prenatally Androgenized Female Rhesus Monkeys Biol Reprod, July 1, 2008; 79(1): 154 - 163. [Abstract] [Full Text] [PDF]
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M. Jensterle, A. Janez, B. Mlinar, J. Marc, J. Prezelj, and M. Pfeifer Impact of metformin and rosiglitazone treatment on glucose transporter 4 mRNA expression in women with polycystic ovary syndrome. Eur. J. Endocrinol., June 1, 2008; 158(6): 793 - 801. [Abstract] [Full Text] [PDF]
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M. C. Vantyghem, D. Vincent-Desplanques, F. Defrance-Faivre, J. Capeau, C. Fermon, A. S. Valat, O. Lascols, A. C. Hecart, P. Pigny, B. Delemer, et al. Fertility and Obstetrical Complications in Women with LMNA-Related Familial Partial Lipodystrophy J. Clin. Endocrinol. Metab., June 1, 2008; 93(6): 2223 - 2229. [Abstract] [Full Text] [PDF]
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L.P. Cheung, R.C.W. Ma, P.M. Lam, I.H. Lok, C.J. Haines, W.Y. So, P.C.Y. Tong, C.S. Cockram, C.C. Chow, and W.B. Goggins Cardiovascular risks and metabolic syndrome in Hong Kong Chinese women with polycystic ovary syndrome Hum. Reprod., June 1, 2008; 23(6): 1431 - 1438. [Abstract] [Full Text] [PDF]
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S. Franks, J. Stark, and K. Hardy Follicle dynamics and anovulation in polycystic ovary syndrome Hum. Reprod. Update, May 22, 2008; (2008) dmn015v1. [Abstract] [Full Text] [PDF]
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S. E. Recabarren, R. Smith, R. Rios, M. Maliqueo, B. Echiburu, E. Codner, F. Cassorla, P. Rojas, and T. Sir-Petermann Metabolic Profile in Sons of Women with Polycystic Ovary Syndrome J. Clin. Endocrinol. Metab., May 1, 2008; 93(5): 1820 - 1826. [Abstract] [Full Text] [PDF]
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N. A. Shah, H. J. Antoine, M. Pall, K. D. Taylor, R. Azziz, and M. O. Goodarzi Association of Androgen Receptor CAG Repeat Polymorphism and Polycystic Ovary Syndrome J. Clin. Endocrinol. Metab., May 1, 2008; 93(5): 1939 - 1945. [Abstract] [Full Text] [PDF]
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 M. K. Tee, Q. Dong, and W. L. Miller Pathways Leading to Phosphorylation of P450c17 and to the Posttranslational Regulation of Androgen Biosynthesis Endocrinology, May 1, 2008; 149(5): 2667 - 2677. [Abstract] [Full Text] [PDF]
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M.O. Goodarzi, N. Xu, J. Cui, X. Guo, Y.I. Chen, and R. Azziz Small glutamine-rich tetratricopeptide repeat-containing protein alpha (SGTA), a candidate gene for polycystic ovary syndrome Hum. Reprod., May 1, 2008; 23(5): 1214 - 1219. [Abstract] [Full Text] [PDF]
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M. Mohlig, M. O Weickert, E. Ghadamgahi, A. M Arafat, J. Spranger, A. F H Pfeiffer, and C. Schofl Retinol-binding protein 4 is associated with insulin resistance, but appears unsuited for metabolic screening in women with polycystic ovary syndrome. Eur. J. Endocrinol., April 1, 2008; 158(4): 517 - 523. [Abstract] [Full Text] [PDF]
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A. Mueller, L. J. Gooren, S. Naton-Schotz, S. Cupisti, M. W. Beckmann, and R. Dittrich Prevalence of Polycystic Ovary Syndrome and Hyperandrogenemia in Female-to-Male Transsexuals J. Clin. Endocrinol. Metab., April 1, 2008; 93(4): 1408 - 1411. [Abstract] [Full Text] [PDF]
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R. S. Legro, H. X. Barnhart, W. D. Schlaff, B. R. Carr, M. P. Diamond, S. A. Carson, M. P. Steinkampf, C. Coutifaris, P. G. McGovern, N. A. Cataldo, et al. Ovulatory Response to Treatment of Polycystic Ovary Syndrome Is Associated with a Polymorphism in the STK11 Gene J. Clin. Endocrinol. Metab., March 1, 2008; 93(3): 792 - 800. [Abstract] [Full Text] [PDF]
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M. Das, O. Djahanbakhch, B. Hacihanefioglu, E. Saridogan, M. Ikram, L. Ghali, M. Raveendran, and A. Storey Granulosa Cell Survival and Proliferation Are Altered in Polycystic Ovary Syndrome J. Clin. Endocrinol. Metab., March 1, 2008; 93(3): 881 - 887. [Abstract] [Full Text] [PDF]
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M. Corton, J. I. Botella-Carretero, J. A. Lopez, E. Camafeita, J. L. San Millan, H. F. Escobar-Morreale, and B. Peral Proteomic analysis of human omental adipose tissue in the polycystic ovary syndrome using two-dimensional difference gel electrophoresis and mass spectrometry Hum. Reprod., March 1, 2008; 23(3): 651 - 661. [Abstract] [Full Text] [PDF]
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S. Palomba, F. Giallauria, A. Falbo, T. Russo, R. Oppedisano, A. Tolino, A. Colao, C. Vigorito, F. Zullo, and F. Orio Structured exercise training programme versus hypocaloric hyperproteic diet in obese polycystic ovary syndrome patients with anovulatory infertility: a 24-week pilot study Hum. Reprod., March 1, 2008; 23(3): 642 - 650. [Abstract] [Full Text] [PDF]
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 N. M. Punjabi The Epidemiology of Adult Obstructive Sleep Apnea Proceedings of the ATS, February 15, 2008; 5(2): 136 - 143. [Abstract] [Full Text] [PDF]
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B. O. Yildiz, E. S. Knochenhauer, and R. Azziz Impact of Obesity on the Risk for Polycystic Ovary Syndrome J. Clin. Endocrinol. Metab., January 1, 2008; 93(1): 162 - 168. [Abstract] [Full Text] [PDF]
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M. O. Goodarzi, M. R. Jones, H. J. Antoine, M. Pall, Y.-D. I. Chen, and R. Azziz Nonreplication of the Type 5 17 -Hydroxysteroid Dehydrogenase Gene Association with Polycystic Ovary Syndrome J. Clin. Endocrinol. Metab., January 1, 2008; 93(1): 300 - 303. [Abstract] [Full Text] [PDF]
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K. E. S. Salley, E. P. Wickham, K. I. Cheang, P. A. Essah, N. W. Karjane, and J. E. Nestler POSITION STATEMENT: Glucose Intolerance in Polycystic Ovary Syndrome A Position Statement of the Androgen Excess Society J. Clin. Endocrinol. Metab., December 1, 2007; 92(12): 4546 - 4556. [Abstract] [Full Text] [PDF]
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J. B. Spencer, M. Klein, A. Kumar, and R. Azziz The Age-Associated Decline of Androgens in Reproductive Age and Menopausal Black and White Women J. Clin. Endocrinol. Metab., December 1, 2007; 92(12): 4730 - 4733. [Abstract] [Full Text] [PDF]
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S. Tan, S. Hahn, S. Benson, T. Dietz, H. Lahner, L. C Moeller, M. Schmidt, S. Elsenbruch, R. Kimmig, K. Mann, et al. Metformin improves polycystic ovary syndrome symptoms irrespective of pre-treatment insulin resistance Eur. J. Endocrinol., November 1, 2007; 157(5): 669 - 676. [Abstract] [Full Text] [PDF]
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 A. H Balen and A. J Rutherford Managing anovulatory infertility and polycystic ovary syndrome BMJ, September 29, 2007; 335(7621): 663 - 666. [Full Text] [PDF]
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R. L. Barbieri Clomiphene Versus Metformin for Ovulation Induction in Polycystic Ovary Syndrome: The Winner Is .... J. Clin. Endocrinol. Metab., September 1, 2007; 92(9): 3399 - 3401. [Full Text] [PDF]
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S. Palomba, F. Orio Jr., A. Falbo, T. Russo, A. Tolino, and F. Zullo Clomiphene Citrate Versus Metformin as First-Line Approach for the Treatment of Anovulation in Infertile Patients with Polycystic Ovary Syndrome J. Clin. Endocrinol. Metab., September 1, 2007; 92(9): 3498 - 3503. [Abstract] [Full Text] [PDF]
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M. Luque-Ramirez, F. Alvarez-Blasco, J. I. Botella-Carretero, R. Sanchon, J. L. San Millan, and H. F. Escobar-Morreale Increased Body Iron Stores of Obese Women With Polycystic Ovary Syndrome Are a Consequence of Insulin Resistance and Hyperinsulinism and Are Not a Result of Reduced Menstrual Losses Diabetes Care, September 1, 2007; 30(9): 2309 - 2313. [Abstract] [Full Text] [PDF]
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M. Mohlig, M. O Weickert, E. Ghadamgadai, A. Machlitt, B. Pfuller, A. M Arafat, A. F H Pfeiffer, and C. Schofl Adipocyte fatty acid-binding protein is associated with markers of obesity, but is an unlikely link between obesity, insulin resistance, and hyperandrogenism in polycystic ovary syndrome women Eur. J. Endocrinol., August 1, 2007; 157(2): 195 - 200. [Abstract] [Full Text] [PDF]
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M. O. Goodarzi, H. J. Antoine, and R. Azziz Genes for Enzymes Regulating Dehydroepiandrosterone Sulfonation Are Associated with Levels of Dehydroepiandrosterone Sulfate in Polycystic Ovary Syndrome J. Clin. Endocrinol. Metab., July 1, 2007; 92(7): 2659 - 2664. [Abstract] [Full Text] [PDF]
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T. Sir-Petermann, B. Echiburu, M M. Maliqueo, N. Crisosto, F. Sanchez, C. Hitschfeld, M. Carcamo, P. Amigo, and F. Perez-Bravo Serum adiponectin and lipid concentrations in pregnant women with polycystic ovary syndrome Hum. Reprod., July 1, 2007; 22(7): 1830 - 1836. [Abstract] [Full Text] [PDF]
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 R. S. Legro, H. X. Barnhart, W. D. Schlaff, B. R. Carr, M. P. Diamond, S. A. Carson, M. P. Steinkampf, C. Coutifaris, P. G. McGovern, N. A. Cataldo, et al. Clomiphene, Metformin, or Both for Infertility in the Polycystic Ovary Syndrome N. Engl. J. Med., February 8, 2007; 356(6): 551 - 566. [Abstract] [Full Text] [PDF]
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 R. S. Legro A 27-Year-Old Woman With a Diagnosis of Polycystic Ovary Syndrome JAMA, February 7, 2007; 297(5): 509 - 519. [Abstract] [Full Text] [PDF]
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B. Banaszewska, L. Pawelczyk, R. Z. Spaczynski, J. Dziura, and A. J. Duleba Effects of Simvastatin and Oral Contraceptive Agent on Polycystic Ovary Syndrome: Prospective, Randomized, Crossover Trial J. Clin. Endocrinol. Metab., February 1, 2007; 92(2): 456 - 461. [Abstract] [Full Text] [PDF]
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M. Corton, J. I. Botella-Carretero, A. Benguria, G. Villuendas, A. Zaballos, J. L. San Millan, H. F. Escobar-Morreale, and B. Peral Differential Gene Expression Profile in Omental Adipose Tissue in Women with Polycystic Ovary Syndrome J. Clin. Endocrinol. Metab., January 1, 2007; 92(1): 328 - 337. [Abstract] [Full Text] [PDF]
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M. C Amato, A. Galluzzo, S. Merlino, A. Mattina, P. Richiusa, A. Criscimanna, and C. Giordano Lower insulin sensitivity differentiates hirsute from non-hirsute Sicilian women with polycystic ovary syndrome Eur. J. Endocrinol., December 1, 2006; 155(6): 859 - 865. [Abstract] [Full Text] [PDF]
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R. Azziz, E. Carmina, D. Dewailly, E. Diamanti-Kandarakis, H. F. Escobar-Morreale, W. Futterweit, O. E. Janssen, R. S. Legro, R. J. Norman, A. E. Taylor, et al. Criteria for Defining Polycystic Ovary Syndrome as a Predominantly Hyperandrogenic Syndrome: An Androgen Excess Society Guideline J. Clin. Endocrinol. Metab., November 1, 2006; 91(11): 4237 - 4245. [Abstract] [Full Text] [PDF]
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M. O. Goodarzi, N. A. Shah, H. J. Antoine, M. Pall, X. Guo, and R. Azziz Variants in the 5{alpha}-Reductase Type 1 and Type 2 Genes Are Associated with Polycystic Ovary Syndrome and the Severity of Hirsutism in Affected Women J. Clin. Endocrinol. Metab., October 1, 2006; 91(10): 4085 - 4091. [Abstract] [Full Text] [PDF]
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G. G. Gosman, H. I. Katcher, and R. S. Legro Obesity and the role of gut and adipose hormones in female reproduction Hum. Reprod. Update, September 1, 2006; 12(5): 585 - 601. [Abstract] [Full Text] [PDF]
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X. Chen, D. Yang, L. Li, S. Feng, and L. Wang Abnormal glucose tolerance in Chinese women with polycystic ovary syndrome Hum. Reprod., August 1, 2006; 21(8): 2027 - 2032. [Abstract] [Full Text] [PDF]
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M. Mohlig, A. Jurgens, J. Spranger, K. Hoffmann, M. O Weickert, H. W Schlosser, T. Schill, G. Brabant, A. Schuring, A. F H Pfeiffer, et al. The androgen receptor CAG repeat modifies the impact of testosterone on insulin resistance in women with polycystic ovary syndrome. Eur. J. Endocrinol., July 1, 2006; 155(1): 127 - 130. [Abstract] [Full Text] [PDF]
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 M. J. Himelein and S. S. Thatcher Depression and Body Image among Women with Polycystic Ovary Syndrome J Health Psychol, July 1, 2006; 11(4): 613 - 625. [Abstract] [PDF]
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S.K. Blank, C.R. McCartney, and J.C. Marshall The origins and sequelae of abnormal neuroendocrine function in polycystic ovary syndrome Hum. Reprod. Update, July 1, 2006; 12(4): 351 - 361. [Abstract] [Full Text] [PDF]
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J. M. Vink, S. Sadrzadeh, C. B. Lambalk, and D. I. Boomsma Heritability of Polycystic Ovary Syndrome in a Dutch Twin-Family Study J. Clin. Endocrinol. Metab., June 1, 2006; 91(6): 2100 - 2104. [Abstract] [Full Text] [PDF]
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E. Codner, N. Soto, P. Lopez, L. Trejo, A. Avila, F. C. Eyzaguirre, G. Iniguez, and F. Cassorla Diagnostic Criteria for Polycystic Ovary Syndrome and Ovarian Morphology in Women with Type 1 Diabetes Mellitus J. Clin. Endocrinol. Metab., June 1, 2006; 91(6): 2250 - 2256. [Abstract] [Full Text] [PDF]
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K. Rautio, J.S. Tapanainen, A. Ruokonen, and L.C. Morin-Papunen Endocrine and metabolic effects of rosiglitazone in overweight women with PCOS: a randomized placebo-controlled study Hum. Reprod., June 1, 2006; 21(6): 1400 - 1407. [Abstract] [Full Text] [PDF]
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 S. Sam, R. S. Legro, P. A. Essah, T. Apridonidze, and A. Dunaif Evidence for metabolic and reproductive phenotypes in mothers of women with polycystic ovary syndrome PNAS, May 2, 2006; 103(18): 7030 - 7035. [Abstract] [Full Text] [PDF]
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T. L. Setji, N. D. Holland, L. L. Sanders, K. C. Pereira, A. M. Diehl, and A. J. Brown Nonalcoholic Steatohepatitis and Nonalcoholic Fatty Liver Disease in Young Women with Polycystic Ovary Syndrome J. Clin. Endocrinol. Metab., May 1, 2006; 91(5): 1741 - 1747. [Abstract] [Full Text] [PDF]
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N. Xita and A. Tsatsoulis Fetal Programming of Polycystic Ovary Syndrome by Androgen Excess: Evidence from Experimental, Clinical, and Genetic Association Studies J. Clin. Endocrinol. Metab., May 1, 2006; 91(5): 1660 - 1666. [Abstract] [Full Text] [PDF]
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L. Ibanez and F. de Zegher Low-dose flutamide-metformin therapy for hyperinsulinemic hyperandrogenism in non-obese adolescents and women Hum. Reprod. Update, May 1, 2006; 12(3): 243 - 252. [Abstract] [Full Text] [PDF]
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J. C. Lo, S. L. Feigenbaum, J. Yang, A. R. Pressman, J. V. Selby, and A. S. Go Epidemiology and Adverse Cardiovascular Risk Profile of Diagnosed Polycystic Ovary Syndrome J. Clin. Endocrinol. Metab., April 1, 2006; 91(4): 1357 - 1363. [Abstract] [Full Text] [PDF]
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C. M. DeUgarte, K. S. Woods, A. A. Bartolucci, and R. Azziz Degree of Facial and Body Terminal Hair Growth in Unselected Black and White Women: Toward a Populational Definition of Hirsutism J. Clin. Endocrinol. Metab., April 1, 2006; 91(4): 1345 - 1350. [Abstract] [Full Text] [PDF]
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N. I. Leibel, E. E. Baumann, M. Kocherginsky, and R. L. Rosenfield Relationship of Adolescent Polycystic Ovary Syndrome to Parental Metabolic Syndrome J. Clin. Endocrinol. Metab., April 1, 2006; 91(4): 1275 - 1283. [Abstract] [Full Text] [PDF]
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S. Elsenbruch, S. Benson, S. Hahn, S. Tan, K. Mann, K. Pleger, R. Kimmig, and O. E. Janssen Determinants of emotional distress in women with polycystic ovary syndrome Hum. Reprod., April 1, 2006; 21(4): 1092 - 1099. [Abstract] [Full Text] [PDF]
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R. Azziz Diagnosis of Polycystic Ovarian Syndrome: The Rotterdam Criteria Are Premature J. Clin. Endocrinol. Metab., March 1, 2006; 91(3): 781 - 785. [Abstract] [Full Text] [PDF]
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 T. Bridger, S. MacDonald, F. Baltzer, and C. Rodd Randomized Placebo-Controlled Trial of Metformin for Adolescents With Polycystic Ovary Syndrome Arch Pediatr Adolesc Med, March 1, 2006; 160(3): 241 - 246. [Abstract] [Full Text] [PDF]
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S. Hahn, U. Haselhorst, B. Quadbeck, S. Tan, R. Kimmig, K. Mann, and O. E Janssen Decreased soluble leptin receptor levels in women with polycystic ovary syndrome Eur. J. Endocrinol., February 1, 2006; 154(2): 287 - 294. [Abstract] [Full Text] [PDF]
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M. Mohlig, J. Spranger, M. Ristow, A. F H Pfeiffer, T. Schill, H. W Schlosser, L. Moltz, G. Brabant, and C. Schofl Predictors of abnormal glucose metabolism in women with polycystic ovary syndrome Eur. J. Endocrinol., February 1, 2006; 154(2): 295 - 301. [Abstract] [Full Text] [PDF]
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D. A. Ehrmann, D. R. Liljenquist, K. Kasza, R. Azziz, R. S. Legro, M. N. Ghazzi, and for the PCOS/Troglitazone Study Group Prevalence and Predictors of the Metabolic Syndrome in Women with Polycystic Ovary Syndrome J. Clin. Endocrinol. Metab., January 1, 2006; 91(1): 48 - 53. [Abstract] [Full Text] [PDF]
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R. Zhou, I. M. Bird, D. A. Dumesic, and D. H. Abbott Adrenal Hyperandrogenism Is Induced by Fetal Androgen Excess in a Rhesus Monkey Model of Polycystic Ovary Syndrome J. Clin. Endocrinol. Metab., December 1, 2005; 90(12): 6630 - 6637. [Abstract] [Full Text] [PDF]
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