Life table analysis and the two-parameter exponential method have been applied to pregnancy rates in 72 patients undergoing laparoscopic cautery exclusively. Patients with male factor infertility were excluded. Estimated cure rates for patients with stage I and II disease were 98.2% and 76.6%, respectively (not significantly different). No significant difference was seen when anovulation complicated the endometriosis (68.6%). When greater than one infertility factor was present, a significant difference was observed (50.6%). Patients with stage I disease had an average fecundity of 10.30% with decreasing values observed in stage II (7.59%), anovulation (6.67%), and more than one infertility factor (3.33%). We conclude that laparoscopic cauterization is an effective mode of therapy for the treatment of stage I and II endometriosis associated with infertility.