When does a fetus develop a brain?

Your baby's sense of movement has developed, so he can feel the motion if you dance. His sense of hearing continues to improve. You may sometimes be able to see him squirming under the surface of your belly. 24 weeks: Your baby's taste buds are developing. Her brain is growing very quickly, and her hair may be growing, too. read more

Growth is rapid this week. Just four weeks after conception, the neural tube along your baby's back is closing. The baby's brain and spinal cord will develop from the neural tube. The heart and other organs also are starting to form. Structures necessary to the development of the eyes and ears develop. Small buds appear that will soon become arms. read more

Third trimester: Baby's brain grows. The third trimester is brimming with rapid development of neurons and wiring. Baby's brain roughly triples in weight during the last 13 weeks of gestation, growing from about 3. 5 ounces at the end the second trimester to almost 10. 6 ounces at term. read more

Third trimester: Baby's brain grows. The third trimester is brimming with rapid development of neurons and wiring. Baby's brain roughly triples in weight during the last 13 weeks of gestation, growing from about 3.5 ounces at the end the second trimester to almost 10.6 ounces at term. read more

At 28 weeks, the fetus weighs over 2 pounds and if born prematurely, would most likely be able to survive. At 32 weeks, the baby weighs 4 pounds and fat layers begin to develop under its skin. At 36 weeks, the lungs are almost fully developed and brain function is developing rapidly. At 37 weeks, a term pregnancy can be made. read more

Your baby's brain starts developing almost at the moment of conception, according to the Long Island Spectrum Center website. By the time you are three weeks pregnant, the developing embryo has formed a neural groove, which is the foundation for the brain structure. By the time your baby is born, her brain will have over 100 billion neurons. read more