30 weeks

Your baby's about 15.7 inches long now, and she weighs almost 3 pounds (like a head of cabbage). A pint and a half of amniotic fluid surrounds her, but that volume will decrease as she gets bigger and takes up more room in your uterus. Her eyesight continues to develop, though it's not very keen; even after she's born, she'll keep her eyes closed for a good part of the day. When she does open them, she'll respond to changes in light but will have 20/400 vision — which means she can only make out objects a few inches from her face. (Normal adult vision is 20/20.)
You baby's length is about 16 inches—about as long as a laptop computer—and she measures almost 11 inches from crown to rump. She weighs approximately 2 1/2 to 3 pounds. From now until delivery, every baby will gain weight at a more individual rate. Your baby has doubled in height over the past six weeks, and from now until delivery, she'll gain only a few more inches in length. Don't worry if she's in a strange position (what your care provider might call a "transverse lie"). There's still plenty of time for her to get settled into the head-down (cephalic) position for birth. She's floating in about 1 1/2 pints of amniotic fluid and has some room to move. Your baby's most important organ, her brain, continues to develop at a rapid pace. Her eyes are able to track light, and some researchers have theorized that exposing your belly to light may stimulate development. Try moving the beam of a flashlight slowly over your belly in a dim room, and see if she reacts.