your baby can be as tall as 17 inches now and can weigh nearly 3 pounds. Though already coming pretty close (within 3 inches or so) of his or her ultimate birth length, baby sitt has lots to gain. In fact, over the next 11 weeks, your baby more than doubles-and may even come close to tripling-his or her weight. Much of that weight will come from the fat accumulating under his or her skin right now.And as your baby plumps up, the room in your womb will start to feel a little cramped, making it less likely that you'll feel hard kicks from your little one,and more likely that you'll be feeling jabs and pokes from elbows and knees.