Your baby's brain is one of the first major organs to start developing – just three weeks in. And here's the wild part: It'll keep growing all the way into their 20s. The brain and spinal cord team up ...
The fetal nervous system — i.e. your baby's brain, spinal cord, and nerves — is one of the very first systems to develop. In fact, it's making big strides before you even know you're pregnant. Fetal ...