[Diagnosis and management of a haemorrhagic emergency revealing an acquired haemophilia].

We relate the case of a 22-year-old woman, without any particular medical history, apart from a previous full-term pregnancy with no complication, for whom the discovery of prolongated APTT (Activated Partial Thromboplastin Time) postponed an emergency operation in spite of intracystic ovarian haemorrhage. The complementary check-up revealed the existence of an autoantibody antifactor VIII (antithromboplastinogen), showing acquired postpartum haemophilia.