Your baby is now over 7 inches long. His skin becomes covered with a slippery, white, coating called vernix caseosa, or vernix for short. Vernix helps protect baby’s delicate skin, keeping it from becoming chapped/scratched. Under the vernix, fine hair called lanugo covers his skin. His kidneys are now developed enough to make urine, which is excreted into your amniotic sac. Unlike your urine, your baby’s urine is sterile because he or she is living in a sterile environment. Therefore, when your baby swallows amniotic fluid containing urine, it is not a problem. His hearing is now well developed, and he is starting to hear external sounds including your conversations. His brain continues to develop millions of motor neurons that help the muscles and brain communicate. Specialized areas begin to form in his brain for different senses such as taste, smell, hearing and touch. His arms and legs are in proportion to the rest of his body. He can now make conscious muscle movements, such as sucking a thumb or moving his head.