Different baby positions in the uterus

Before birth, babies lie in the uterus in different positions. Most babies lie with their head down and close to the vagina (as shown in A). Doctors also call this "vertex" or "cephalic" presentation. But some babies lie with their legs, buttocks, or shoulders down. Doctors call it "breech" if a baby's legs or buttocks are closest to the vagina (as shown in B).