Comparison of outcomes of twins conceived spontaneously and by artificial reproductive therapy.

Objective: To compare the outcomes of twin pregnancies conceived by artificial reproductive techniques (ART) with those of spontaneous conception.

Study Design: In this multicenter prospective trial, comparisons were made between methods of conception in twin pregnancies, for maternal and perinatal outcomes.

Results: Of 1001 twin pairs, 763/1001 (72.

Ultrasonic evidence of placental calcification at 36 weeks' gestation: maternal and fetal outcomes.

Background: To determine the significance of an inappropriately mature placenta on ultrasound examination (Grannum classification), in a low-risk obstetric population. Scans were performed at 36 weeks' gestation. The study group comprised patients demonstrating a grade III placenta, and the control group comprised patients not demonstrating a grade III placenta.