[On pregnancies with previous uterine scar].

Pregnancies with previous cesarean section and myomectomy uterine scar was studied in 161 cases. The rate of vaginal delivery was 9.4%; the rates of front wall placenta, adherent placenta, placenta previa and placenta percreta were 51.0%, 7.5%, 5.7% and 0.9% respectively. Postpartum hemorrhage increased in the later three groups. The rate of uterine rupture was 4.1% in the term pregnancies; puerperal morbidity 6.6%. All these pathological statuses bore on relation to the time elapse from uterine scar formation to recent pregnancy. There were no serious complications in 63 cases of induced early abortion and 31 late abortion. It is emphasised that the quality of the operation should be improved to provide good chances of success in trial labour later on and attention should be paid to abnormal implantation of the placenta as well as rupture of the uterine scars.