This chapter focuses on three entities namely disseminated intravascular coagulation (DIC), HELLP syndrome, and thrombotic thrombocytopenic purpura (TTP), which represents unique and critical threats to the well-being of mother and fetus during peripartum period. It is concerned with the etiology, clinical features, diagnostic methods and management of these entities. In non-bleeding patients with DIC, platelets and factor replacement should not be administered prophylactically or based on laboratory tests alone. The treatment of HELLP involves monitoring and responding to maternal signs and symptoms, particularly when pre-eclampsia is present, and includes fluid management and the use of antihypertensive agents and magnesium sulfate for seizure prophylaxis. Plasma exchange is the treatment of choice for TTP. The optimal treatment regimen for obstetric coagulation disorders continues to evolve, given the frequently dynamic clinical situation, the presence and health of the fetus, and a growing interest in conducting investigations during the peripartum period.