Bleeding during the second half of pregnancy is usually due to either<unk><unk>  or<unk> previa.  Differentiating these 2 conditions is important to the care of the patient.
Placental abruption differential diagnosis
Pre-eclampsia differential diagnosis
Chorioamnionitis other imaging findings
Eclampsia differential diagnosis
Pre-eclampsia diagnostic study of choice
Ectopic pregnancy risk factors
Gestational trophoblastic neoplasia causes
Epistaxis risk factors