Journal of Clinical Endocrinology & Metabolism, Vol 73, 811-817, Copyright © 1991 by Endocrine Society

ARTICLES

Serum bioactive and immunoreactive luteinizing hormone and follicle- stimulating hormone levels in women with cycle abnormalities, with or without polycystic ovarian disease

BC Fauser, TD Pache, SW Lamberts, WC Hop, FH de Jong and KD Dahl
Department of Obstetrics and Gynecology, Dijkzigt University Hospital, Rotterdam, The Netherlands.

Serum steroid, gonadotropin, and alpha-subunit levels were assessed in 35 women with cycle abnormalities [11 with and 24 without polycystic ovarian disease (PCOD) according to strict clinical and biochemical criteria] and 8 regularly cycling women in the early (cycle day 3 or 4) and mid (cycle day 7 or 8) follicular phase. LH and FSH levels were estimated using two immunological techniques [RIA and immunoradiometric assay (IRMA)] and in vitro bioassays (BIO), using mouse Leydig cells and rat granulosa cells, respectively. In PCOD patients mean alpha- subunit, free androgen index [FAI; testosterone x 100/sex hormone- binding globulin (SHBG)], androstenedione, estrone, and estradiol (E2) were significantly elevated compared to levels in the early follicular phase of control cycles and non-PCOD patients. In addition, in PCOD patients mean IRMA-LH and RIA-LH levels were distinctly increased (2.8- to 3.6 fold, respectively; both comparisons, P less than 0.001) compared to control values, but in the same order of magnitude (1.3- to 1.4-fold increments) as that in non-PCOD patients. However, the median BIO-LH level in PCOD patients was 5.9-fold higher than that in non-PCOD patients and 4.0-fold higher than the BIO-LH in the early follicular phase of control women. Consequently, the median BIO/IRMA-LH ratio was 4.8-fold higher in PCOD patients compared to non-PCOD patients. In women with cycle abnormalities, individual BIO/IRMA-LH ratios correlated with BIO-LH (rs = 0.48), FAI (rs = 0.39), free estrogens (E2/SHBG ratios; rs = 0 0.47), and dehydroepiandrosterone sulfate (rs = 0.60) concentrations. Mean IRMA-, RIA-, and BIO-FSH levels and BIO/IRMA- FSH ratios were not significantly different when various groups were compared. Although RIA- and IRMA-LH levels showed good correlation (rs = 0.88), RIA-LH levels were consistently higher, resulting in distinctly higher RIA-LH/FSH ratios (mean, 4.5) compared to IRMA-LH/FSH ratios (median, 1.8) in PCOD patients.(ABSTRACT TRUNCATED AT 400 WORDS)

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