27 weeks

Your baby is really starting to get big. This week he weighs almost 2 pounds and is about 14.4 inches long with his legs extended. He now sleeps and wakes at regular intervals. He may suck his fingers, and although his lungs are still immature, they would be capable of functioning — with assistance — if he were born prematurely. Chalk up any rhythmic movement you may be feeling to a case of baby hiccups, which may be common from now on.