30 Weeks & A Belly Shot

Your baby's about 15.7 inches long now, and he weighs about 3 pounds (like a head of cabbage). A pint and a half of amniotic fluid surrounds him, but that volume will decrease as he gets bigger and takes up more room in your uterus. His eyesight continues to develop, though it's not very keen; even after he's born, he'll keep his eyes closed for a good part of the day. When he does open them, he'll respond to changes in light but will have 20/400 vision – which means he can only make out objects a few inches from his face.

29 Weeks

Your baby is growing rapidly now. This week he weighs about 2 1/2 pounds (like a butternut squash) and is a tad over 15 inches long from head to heel. His muscles and lungs are continuing to mature, and his head is getting bigger to accommodate his growing brain – which is busy developing billions of neurons. Every day, about 200 milligrams of calcium is deposited in your baby's skeleton, which is now hardening. With this rapid growth, it's no surprise that your baby's nutritional needs reach their peak during this trimester.