The effect of combined oral contraceptive steroids on the gonadotropin responses to LH-RH in lactating women with regular menstrual cycles resumed

Contraception
K Ryu, S S Hong

Abstract

The effect of combined oral contraceptive steroids upon pituitary response to stimulation with 100 micrograms LH-RH was studied in both non-puerperal and lactating women with regular menstrual cycles. Serum prolactin concentration was 14.20 ng/ml in non-puerperal women whereas it was 39.37 ng/ml in lactating women. A comparability was shown in the LH response to LH-RH in non-puerperal women and lactating women. FSH response to LH-RH, however, was significantly exaggerated in lactating-menstruating women as compared to that of non-puerperal women. Combined oral contraceptive steroids lowered basal levels of LH and FSH in non-puerperal women and lactating women although the difference was not statistically significant in non-puerperal women. The LH and FSH maximal responses to LH-RH were significantly diminished in both non-puerperal and lactating women on combined oral contraceptives. There was, however, no difference in the mean LH or FSH responses between non-puerperal women and lactating women. Combined oral contraceptive steroids used in this study seemed to suppress ovulation by decreasing the pituitary responsiveness to LH-RH in lactating-menstruating women as well as in normally menstruating women.

References

Apr 1, 1978·American Journal of Obstetrics and Gynecology·J A ScottD R Mishell
Jun 1, 1977·The Journal of Clinical Endocrinology and Metabolism·G C LachelinS S Yen
Apr 1, 1972·The Journal of Clinical Endocrinology and Metabolism·A J KastinA Arimura
Oct 1, 1972·The Journal of Obstetrics and Gynaecology of the British Commonwealth·S J Nillius, L Wide
Dec 1, 1972·The Journal of Clinical Endocrinology and Metabolism·S S YenY Ehara
Jun 1, 1981·The Journal of Clinical Endocrinology and Metabolism·S E MonroeR B Jaffe

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