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Pulsatile luteinizing hormone secretion pattern in hyperandrogenemic women
M A Graf1, P Bielfeld, W Distler
1Department of Obstetrics and Gynecology, University of Düsseldorf, Germany.
Fertility and Sterility
|April 1, 1993
Summary
In women with hyperandrogenemia and chronic anovulation, altered gonadotropin secretion patterns were observed. Elevated estrone (E1) levels, not testosterone (T) or androstenedione (A), were linked to changes in luteinizing hormone (LH) pulsatility.
Area of Science:
- Reproductive Endocrinology
- Hormonal Imbalances
- Infertility Research
Background:
- Hyperandrogenism is a common cause of chronic anovulation, impacting fertility.
- Understanding gonadotropin secretion patterns is crucial for diagnosing and managing anovulatory disorders.
Purpose of the Study:
- To investigate alterations in gonadotropin secretion patterns in women with hyperandrogenemic chronic anovulation.
- To identify correlations between hormone levels and gonadotropin pulsatility in these patients.
Main Methods:
- Prospective study of 32 hyperandrogenemic women and 9 controls.
- Radioimmunological analysis of gonadotropins and steroids via 12-hour blood sampling at 10-minute intervals.
- Computerized analysis of pulsatile luteinizing hormone (LH) and follicle-stimulating hormone (FSH) secretion.
Main Results:
- Hyperandrogenemic women exhibited higher mean LH levels compared to controls.
- Increased LH pulse frequency and amplitude were noted, particularly in subgroups with secondary amenorrhea or elevated mean LH.
- Estrone (E1) levels correlated significantly with accelerated LH pulse frequency and increased LH pulse amplitude.
Conclusions:
- Pulsatile LH release in hyperandrogenemic anovulation is primarily associated with elevated estrone (E1) levels.
- This finding suggests E1 is a key factor influencing gonadotropin secretion dynamics in these patients.