Ectopic pregnancy in Zimbabwe.

One hundred four consecutive ectopic pregnancies were systematically analysed. During the study period, the incidence rate was 110 per 100,000 14-44 year old females per year. A history of prior pelvic infection was given by 53.8% of the cases and was suggested by surgical findings or by histological analysis among 74.9%. Serological evidence of previous chlamydial infection was much more common when ectopic pregnancy occurred in abnormal tubes than in normal tubes or compared to intrauterine pregnancies. The influence of schistosomiasis, endometriosis and ovarian cyst was limited to a very few cases. The analysis of contraceptive habits shows a much higher number of extrauterine pregnancies when the woman is using progestin-only pill than when she is on combined oral tablets.