RESUMO
PIP: 40 cases of microsurgery to reverse tubal sterilizations in a Mexican Social Security Institute (IMSS) hospital between March 1981-July 1984 were retrospectively studied to determine pregnancy rates and success factors. Only patients under 40 years old with no other causes of infertility were included. The same surgical team performed all the operations. 1-3 years of follow-up were provided. Patients' ages ranged from 20-40 years. 30 patients were 25-34 years old. 23 requested the reversal because of a 2nd marriage, 10 just to have another child, and 6 because of the death of 1 or more children. 31 of the sterilizations were by the Pomeroy method, 4 by fimbriectomy, 3 by Pomeroy and fimbriectomy, and 2 by Yoon rings. There were 10 pregnancies, 8 of which began in the 1st 6 postoperative months. 1 or both tubes were 5 cm or longer in all cases in which the woman became pregnant, and all of the sterilization were by the Pomeroy method. Radiographic control at about 6 months indicated that there was bilateral permeability in 9 other cases unilateral permeability in 8. Counting the cases of pregnancy, permeability was reestablished in 67.5% of cases. 2 pregnancies occurred in patients with isthmo-isthmic anastomoses and 8 in patients with isthmic-ampullar anastomoses. Microsurgery has been used in this service since 1981. It is anticipated that result will improve as the team becomes more experienced.^ieng