Abstract
During the years 1963 to 1978, 515 patients were treated with HMG. They were divided into two groups depending upon the absence (Group I) or presence (Group II) of distinct endogenous estrogen activity. Group II patients were referred after failure of clomiphene therapy. None of the patients had mechanical or male infertility factors. The cumulative pregnancy rate (life table method) in Group I patients after six cycles of treatment was 91.2%. In 77 patients from Group I, further treatment was given for a second pregnancy after the first gonadotropin conception. In this group, the cumulative conception rate was 93.6% after eight cycles of treatment. In Group II the cumulative conception rate was 50% after 12 cycles of treatment. In both groups, the results were better in patients who were less than 35 years of age than those who were 35 or more when treated.
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