1. Disseminated Intravascular Coagulation (wikipedia)
2. Ectopic Pregnancy (wikipedia)
3. Hydatidiform Mole (wikipedia)
4. Postpartum Hemorrhage Requiring Hysterectomy (oxford journal)
5. Eclampsia (wikipedia)
6. Amniotic Fluid Embolism (wikipedia)
7. Pulmonary Embolism of Pregnancy (wikipedia)
8. Toxaemia of Pregnancy (thefreedictionary)