Your baby is still growing and gaining weight. Your baby may gain as much as 1 ounce (28g) a day at this point.
If your baby is a boy, his testes should have descended into the scrotum by this time. Your doctor will check that his testes have descended after delivery. About one percent of boys will have undescended testes.
Your baby has been building up waste in his intestines for the past few weeks. Called meconium, this waste is greenish-black and is made up of material from blood cell break down, shedded cells from the lining of the intestine, skin cells and lanugo shed into the amniotic fluid and swallowed, as well as other sources. Meconium is the first waste your baby passes and the first diapers that you change will probably be comprised of this greenish-black, tar-like substance. There is also a chance that your baby will excrete meconium before delivery and have some covering his body.