Take time now, while you are feeling better and your energy is up, to start planning for your baby's arrival. During the second trimester, your baby grows quickly. Between your 18th and 22nd weeks of pregnancy, you will have an ultrasound so your doctor can see how your baby is progressing. You can also find out the sex of your baby, unless you prefer to be surprised. Even though you should feel better now, big changes are still happening in your body. The third trimester The third trimester begins at the 28th week of pregnancy and lasts until delivery, which can be around the 40th week of pregnancy. It is likely that labor will start a few weeks earlier or later; at least 50% of all babies are late bloomers. If you reach (or pass) week 40, there are a few tips you can try to naturally induce labor on your own. But once you reach the 42nd week of pregnancy, you will be overdue, in which case your doctor will induce labor if it doesn't start on its own. Your little one will get much bigger during the third trimester, going from about 2 1/2 pounds and 16 inches long during the 28th week of pregnancy to between 6 and 9 pounds and 19 to 22 inches long by during week 40. Indeed, your baby is growing quickly, don't be surprised if this