abnormal pregnancy
advanced maternal age
cardiac disease in pregnancy
cervical insufficiency
chorioamnionitis
diethylstilbestrol exposure
family history of birth defects
fetal anomalies
fetal ultrasound
history of preterm birth
history of severe preeclampsia
limited obstetrical ultrasound
liver disease in pregnancy
maternal iga nephropathy
maternal substance abuse
maternal thrombophilia
maternal thrombosis
perinatal mood disorders
prenatal genetic counseling
prenatal testing
preterm labor
recurrent miscarriage
recurrent pregnancy loss
teratogen exposure
thoracoamniotic shunting