Abstract
To test the hypothesis that fertility is reduced in baboons with endometriosis. Prospective controlled follow-up study. Institute of Primate Research, Nairobi Kenya. Seventy-one baboons, including 34 controls (normal pelvis) and 37 animals with histologically proven endometriosis (16 spontaneous and 21 induced). Baboons with endometriosis had minimal (n = 9), mild (n = 14), moderate (n = 7), or severe (n = 7) disease. Seventy-one baboons were mated during 286 cycles. Cycle fecundity rate, cycle pregnancy rate, cycle abortion rate. Cycle pregnancy rate (excluding spontaneous abortions) was 15% (44/286) and was comparable between controls (19%, 20/104) and baboons with endometriosis (13%, 24/182). The cycle pregnancy rates were 24%, 10%, 7.5%, and 12.5% in animals with minimal, mild, moderate, and severe endometriosis, respectively. The cycle pregnancy rate was significantly lower in baboons with stage III-IV endometriosis (9%, 6/64) and with stage II disease (10%, 7/73) than in animals with stage I endometriosis (24%, 11/45) or in controls with a normal pelvis (19%). The normal cycle pregnancy rate in baboons with stage I endometriosis and the decreased cycle pregnancy rate in baboons with stage II and stage III-IV disease suggest that fertility decreases with the stage of endometriosis in baboons.
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