3 Month Summary

The eyes, ears, nose, and jaw appear this month. Tooth buds grow, although they won't push through until well after birth. Scalp and body hair sprout as "peach fuzz." And the brain's neurons are developing at a rate of thousands per minute! (You knew you had a genius in the making.)
The ProducersThe kidneys start making urine, the liver makes bile, and the bone marrow creates blood cells. The organs that appeared last month—the spleen, pancreas, and intestines—are becoming more complex. The lungs start to practice their job of expanding and contracting. And the heart, now with four chambers and beating steadily, adds new layers of muscle and protective packaging.
By the end of this month, your little one will measure more than three inches long and weigh between one half and one full ounce.
What's Happenin'It's time for some new moves—wriggling fingers and toes, yawning, sucking, swallowing. Best of all, your little one can move in response to a poke through your belly! Fetuses also begin to show signs of their budding personalities now: Some are sedate, while others are wigglers.
Nice And EasyAt 11 weeks, your baby moves about 30 percent of the time. After this month, however, the brain tells the body, "Cool it; you're wearing yourself out." From here on out, movements are less frequent but start to become more coordinated and interesting.