Hi there, Placental abruption is a complication which cannot be predicted, but can be very debilitating for baby and mother. Your wife having an abruption at 29 weeks does make her at a high risk for abruption in next pregnancy. Her blood pressure though normal in this pregnancy can be a concern in the next one. She will have to be monitored very thoroughly the next time. Fetal growth scan and Dopplers to rule out placental insufficiency will be considered. Also I would like to know if she had a normal delivery or had a caesarean delivery. Sorry about your loss. Hope this helps. Regards.