Outcome of pregnancy following second- or third-trimester intrauterine fetal death

To investigate the outcomes of a pregnancy after a second- or third-trimester intrauterine fetal death (IUFD).

A prospective observational study was conducted at Trousseau Hospital (Paris, France) between 1996 and 2011. The first ongoing pregnancy in women who had had a previous IUFD was monitored. Management of their treatment was according to a standardized protocol. Recurrence of fetal death was the main outcome criterion.

The subsequent pregnancies of 87 women who had experienced at least one previous IUFD were followed up. The cause of previous IUFD was placental in 50 (57%) women, unknown in 19 (22%), adnexal in 12 (14%), metabolic in 2 (2%), and malformative in 4 (5%). Three (3%) participants had another stillbirth. Overall, obstetric complications occurred in 34 (39%) pregnancies (including 22 [25%] preterm births, 5 [6%] small for gestational age, and 6 [7%] maternal vascular complications). Obstetric complications were significantly more common among women whose previous stillbirth had been due to placental causes than among those affected by other causes (P=0.02).

Most pregnancies after IUFD resulted in a live birth; however, adverse obstetric outcomes were more common when the previous stillbirth was due to placental causes.