Our baby's development update 26-29 weeks

26 weeks
Your baby now weighs a little under 2 pounds and measures about 14 inches, from head to heel. The nerve pathways in her ears are developing, which means her response to sounds is growing more consistent. Her lungs are developing now, too, as she continues to take small breaths of amniotic fluid — good practice for when she's born and takes that first breath of air. If you're having a boy, his testicles are beginning to descend into his scrotum — a trip that will take about two to three days.

27 weeks
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?

28 weeks
By this week, your baby weighs a little over 2 pounds and measures about 14.8 inches from the top of her head to her heels. She can open her eyes — which now sport lashes — and she'll turn her head toward a continuous, bright light from the outside. Her fat layers are beginning to form, too, as she gets ready for life outside the womb.

29 weeks
Your baby now weighs about 2 1/2 pounds and is a tad over 15 inches long from head to heel. His muscles and lungs are continuing to mature, and his head is growing bigger to accommodate his brain — which is busy developing billions of neurons. With this rapid growth, it's no surprise that your baby's nutritional needs reach their peak during this trimester. To keep yourself and him well nourished, you'll need plenty of protein, vitamin C, folic acid, iron, and calcium. (About 200 milligrams of calcium is deposited in your baby's skeleton — which is now hardening — every day.)