Your baby now weighs three pounds and is about 17 inches long from head to toe. In boys, testicles move from near the kidneys through the groin en route to the scrotum. In girls, the clitoris is relatively prominent because it's not yet covered by the still-small labia, which will cover it in the last few weeks before birth).
The baby's head is getting bigger, and brain growth is very rapid at this time. Nearly all babies react to sound by 30 weeks.
Your baby's nutritional needs reach their peak during the third trimester. You'll need plenty of protein, vitamin C, folic acid, iron, and calcium (about 200 milligrams is deposited in your baby's skeleton every day). The skeleton hardens even more, and the brain, muscles, and lungs continue to mature.
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