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LH, FSH AND SKIN TEMPERATURE DURING THE MENOPAUSAL HOT FLAS

Dept. of OB/GYN, Division of Reproductive Endocrinology, University of California Los Angeles California 90024

Six postmenopausal women, who were experiencing frequent hot flashes, had an 8 h continuous recording of skin temperature over the dorsum of the finger as an objective index of hot flashes. Frequent blood samples were obtained during the time of the recording for the measurement of serum luteinizing hormone (LH) and follicle-stimulating hormone (FSH) levels. During the 48 h of recording 34 significant temperature elevations were recorded and 32 were associated with a subjective hot flash. 31 pulses of LH release were also observed with 26 occurring simultaneously with the temperature rises. Correlation analysis of simultaneous skin temperature and circulating LH levels showed a significant positive correlation (p 0.01). FSH levels showed no consistent relationship with skin temperature. These data suggest that LH or the factors that trigger its pulsatile release are related to the mechanism responsible for the initiation of hot flashes.

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