Due primarily to elevated levels of hCG
Vaginal bleeding (75-95%)
Hyperemesis gravidarum (10-25%)
Suspect<unk>  when<unk> -induced hypertension occurs at <24 weeks
Larger than usual uterine size (25%)
Vaginal discharge of grape-like vesicles (10%)
Hyperthyroidism (5%)
Early preeclampsia (5%)
Suspect<unk>  when<unk> -induced hypertension occurs at <24 weeks
Molar pregnancy
Vaginal bleeding
First trimester abortion
Ectopic Pregnancy, heterotopic pregnancy
Septic abortion
First Trimester Abortion 
Ovarian hyperstimulation syndrome
Implantation bleeding