Your Baby's Development Your baby now weighs about 2 pounds, 2
ounces (1,000 grams) and measures about 10 inches (25 cm) from
crown to rump. At your next prenatal appointment, your health
care provider may tell you whether your baby is headfirst or
feet- or bottom-first (called breech position) in the womb.
Babies who are in the breech position may need to be delivered
by cesarean section. Your baby still has 2 months to change
position, though, so don't worry if your baby is in the breech
position right now. Most babies will switch positions on their
own. The folds and grooves of your baby's brain continue to
develop and expand. In addition, your baby continues to add
layers of fat and has continued hair growth. Your health care
provider probably sent you for some blood tests early in your
pregnancy. One thing blood tests measure is the Rh factor, a
substance found in the red blood cells of most people. If you
don't have it (if you’re Rh negative) but your baby does (is Rh
positive), there is potential for y