Placenta accreta is a complication that is rising in incidence. The reported experience of methotrexate treatment in the conservative management of placenta accreta is scant. Three cases of placenta accreta managed with methotrexate are presented. Case 1: A woman had an antenatal diagnosis of placenta percreta. A successful manual placental removal occurred on post-cesarean day 16. Case 2: A woman had retention of a placenta accreta after a term vaginal delivery. Successful dilation and curettage were performed on postpartum day 37. Case 3: A woman had an antenatal diagnosis of placenta previa-percreta with bladder invasion. A simple hysterectomy was performed on post-cesarean day 46. Conservative management and methotrexate treatment resulted in uterine preservation in two of our three patients; however, this treatment did not prevent significant delayed hemorrhage. In view of the rapid resolution of vascular invasion of the bladder, methotrexate may have an important role in the management of placenta percreta with bladder invasion. The utility of methotrexate treatment with the conservative management of placenta accreta requires further evaluation.

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We prospectively studied 96 patients with a history of recurrent spontaneous abortion to determine whether the resistive index of the main uterine artery or subchorionic vessels can allow prediction of pregnancy outcome. The subchorionic RI declined progressively for a mean of 0.54 at 6 weeks to 0.42 at 13 weeks (P < 10(-8), F-test). No significant difference was found in subchorionic RI values between outcomes for liveborn infants versus loss. Uterine artery RI values also declined significantly through the first trimester (P < 10(-8), F-test). Uterine artery RI values tended to be lower in pregnancies ending in loss than in successful gestations; however, there was too much overlap for this index to be clinically useful. In conclusion, first trimester RI does not allow prediction of pregnancy outcome in patients with recurrent abortion.

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