38 Weeks!

Your baby is producing surfactant, which will help him take those first breaths while you're producing colostrum, the precursor to breast milk.
Hey, your little one isn't so little anymore, weighing close to seven pounds and measuring 20 inches long. Fetal development is nearly complete as your baby tends to a few last-minute details like shedding the skin-protecting vernix and lanugo. He's also producing more surfactant, a substance that prevents the air sacs in his lungs from sticking to one another once he starts to breathe. Meanwhile, your body is tending to its own final touches before the big day, one of which is getting that milk machine up and running.