Estimates are up to 15% of pregnancies end in a 1st<unk>  abortion, usually due to fetal chromosomal abnormalities
Primary risk factors include history of prior miscarriage and advanced maternal age
Other risk factors include heavy alcohol use, uterine structure abnormalities, and systemic maternal disease
Other risk factors include heavy alcohol use, uterine structure abnormalities, and systemic maternal disease
First trimester abortion
Ectopic pregnancy
Comorbid diseases in pregnancy
Subchorionic hematoma
Vaginal bleeding in pregnancy 
First Trimester Abortion
Abdominal pain in pregnancy
Complete Abortion