From WebMD:
Your baby now measures about 2.5 inches from crown to rump and weighs between three-tenths of an ounce and half an ounce. It is fully formed, from tooth buds to toenails. Your baby’s job now is to continue to grow big and strong. With the most critical time in your baby’s development behind you, the chance of miscarriage drops considerably after this week. Nausea and energy start to improve but occasional headaches, dizziness and fatigue from hormone changes may be present. If it’s your first baby, you still could be wearing loose-fitting clothes, but if you’ve had other pregnancies, you most likely are back in maternity clothes. The typical weight gain by now is about three to five pounds. Fathers-to-be might also experience pregnancy symptoms, called couvade or “hatching,” during the third month and at delivery, including nausea, abdominal pain, appetite changes and weight gain.
From Baby-Gaga:
Even though your little Einstein’s body is still growing quite rapidly 2 inches long right now, the overall super-speedy growth of their amazing brain continues to leave the head proportionately larger than the body—and is actually slightly more than one third of their total body mass! The head and neck are still straightening at this point as can be seen by their little chin lifting off of the chest. Your baby is also actively rehearsing “breathing” by using amniotic fluid to prepare the lungs for future air respiration.
The big news: your little pooper is now officially going to need diapers! Although a majority of the waste produced is transferred to the mother’s system for discharge (to avoid having it linger in the amniotic sac), some urine is released to the amniotic fluid and your baby will actually breathe it in before it passing it on to your for discharge. Not to worry, urine—in this particular form, is completely harmless to your baby.