27 Weeks

BabyCenter:

Your baby is really starting to fill up your uterus. This week he weighs almost 2 pounds and is about 14.4 inches long with his legs extended. He can now open and close his eyes, and he 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 to be born prematurely. Chalk up any rhythmic movement you may be feeling to a case of baby hiccups, which may be common from now on. Each episode usually lasts only a few moments, and isn't bothersome to him, so enjoy the tickle. With more brain tissue developing, your baby's brain is very active now. Wonder what he's thinking?

iVillage:

Your baby is about 15 inches -- head to toe. If someone puts his or her ear up to your belly, over the fetal back, your baby's heartbeat will probably be distinguishable! Your baby will probably be very active between weeks 24 and 28. You may notice in the weeks to come that your baby will begin to have regular, predictable patterns of movement and sleep.

BabyZone:

Growing, growing, growing! That wrinkly skin is filling out as the fat layers grow. Your baby's eyes are becoming sensitive to light, preparing to see after birth.