haemochorial placenta
hemochorial placenta

Extant strepsirrhines have an epitheliochorial placenta, where the maternal blood does not come in direct contact with the fetal chorion like it does in the hemochorial placenta of haplorhines.

In contrast, Elliot and Crespi (2006) documents the effects of placental immunology on hybrid inviability, showing that mammals with hemochorial placentas more readily hybridize than mammals with epitheliochorial or endotheliochorial placentas.