advanced maternal age
amniotic fluid abnormalities
breech birth
cervical cerclage
cervical funneling
congenital diaphragmatic hernia (cdh)
external cephalic version
fetal pleural effusions
high risk pregnancy
hypertensive disorders of pregnancy
labor and delivery
macrosomia
maternal anticoagulation
maternal hematologic disorders
maternal neurologic disorders
maternal obesity
maternal substance abuse
maternal thyroid disorders
medical complications in pregnancy
obstetrical ultrasound at 14 weeks gestation or less
pelvic malignancy during pregnancy
prenatal testing
saline infusion sonohysterogram
teratogen exposure
twin to twin transfusion syndrome