DD Miscarriage:
Ectopic pregnancy
Blastocyst implants anywhere other than the uterine endometrium
Brownish spotting
Painful vaginal exam especially with movement of the cervix
Rupture can be life-threatening
DD Miscarriage:
Hydatidiform mole
Developmental anomaly of the placenta
Chorionic villi causes placenta to become a benign neoplasm resembling a bunch of grapes
Spotting brownish blood by 12 week
Uterus large for dates