HYPOTHALMIC‐PITUITARY RELATIONSHIPS IN THE POLYCYSTIC OVARY SYNDROME SERUM GONADOTROPHIN LEVELS FOLLOWING INJECTION OF OESTRADIOL BENZOATE

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Abstract
Injection of oestradiol benzoate was found to elicit a surge of luteinizing hormone (LH) in 15 of 19 patients with polycystic ovary (PCO) syndrome; follicle stimulating hormone (FSH) was also released, in conjunction with the LH surge, in eight patients. It is concluded that the oestrogen feedback mechanisms controlling mid‐cycle gonadotrophin release are functioning normally in the majority of patients with PCO syndrome. Ovulation was subsequently induced by clomiphene alone in those patients who had an LH surge, and by a combination of clomiphene and human chorionic gonadotrophin (HCG) in those who had not shown any LH release.