2 cases of unrecognized oviduct pregnancy receiving therapeutic abortion by uterine aspiration are reported. A 29-year-old white female, gravida 4, para 2 with a Dalkon Shield in place for 2 1/2 years and with 6 weeks amenorrhea received a therapeutic abortion. 3 days later the patient complained of fever and severe suprapubic cramps. Minocycline was given in the belief that the patient was suffering from endometritis. 17 days after uterine aspiration the pain increased. At laparoscopy a corpus luteum was seen in the left ovary and blood was present in the pelvis. Histological examination of the oviducts revealed signs of an aborted oviduct pregnant. A 2nd case concerned a 26-year-old white female, gravida 2, para 2, using the Ogino-Knaus method of contraception and who had a normal menses 7 weeks previously. 12 days after uterine aspiration the patient complained of continued vaginal bleeding, lower abdominal cramps, and chills. After uterine aspiration was repeated minocycline therapy was initated. 20 days after the initial aspiration the patient reported a return of vaginal bleeding and lower abdominal pain. Laparotomy revealed a ruptured oviduct. Histology showed salpingitis and fusion of the right fimbria and a large blood clot and trophoblastic villi in the lumen of the right ampulla. In the future it is suggested that histological examination of the aspiration should be performed to aid in finding oviductal or ovarian pregnancies.