During a 30-month period 229 couples were evaluated for infertility at the Naval Regional Medical Center, Oakland. Laparoscopy was used in all cases of otherwise unexplained infertility. The resulting laparoscopic examination of the female partner of 24 such couples demonstrated abnormal findings in 18 (75%). Of these 18 subjects, unsuspected endometriosis was found in 11 (46%) and peritubal adhesions in 7 (29%). Of the 229 couples evaluated, only 8 (3.5%) failed to show some etiologic factor associated with infertility. Thus, the previously reported 10 to 20% incidence of unexplained infertility is too high an estimate in view of the additional information made available through pelvic endoscopy.
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