How your baby’s growing:
Your baby now weighs about 2 1/2 pounds (like a squash) and is a tad over 15 inches long from head to heel. Her muscles and lungs are continuing to mature, and her head is growing bigger to make room for her developing brain. To meet her increasing nutritional demands, you’ll need plenty of protein, vitamins C, folic acid, and iron. And because her bones are soaking up lots of calcium, be sure to drink your milk (or find another good source ofcalcium, 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. Baby’s energy is surging, thanks to the formation of white fat deposits beneath the skin. (Have those kicks and jabs to the ribs tipped you off yet?) 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.