Bleeding in early pregnancy: miscarriage vs molar vs ectopic vs RPOC

Match the stem: misoprostol then bleeding/pain with an open os and blood-filled sac = inevitable miscarriage; very high beta-hCG (>100k) with vesicles/cystic uterine enlargement = molar pregnancy; pain and bleeding with missed menses = exclude ectopic; persistent bleeding after medical termination = retained products of conception.