Week 29

Baby’s energy is surging, thanks to the formation of white fat deposits beneath the skin. Baby is also settling into sleep and waking cycles, though -- as you’ve also probably noticed -- they don’t necessarily coincide with your own. Also this month, all five senses are finally functional, and the brain and nervous system are going through major developments.

Baby now weighs about 2 1/2 pounds and is a tad over 15 inches long from head to heel. Muscles and lungs are continuing to mature, and the head is growing bigger to make room for the developing brain. To meet baby's increasing nutritional demands, Mom will need plenty of protein, vitamins C, folic acid, and iron. And because baby's bones are soaking up lots of calcium, be sure to drink your milk (or find another good source of calcium, such as cheese, yogurt, or enriched orange juice). This trimester, about 250 milligrams of calcium are deposited in your baby's hardening skeleton each day.