Your baby might touch 17.2 inches from head to toe by the end of this week. He may weigh up to 2 kg.
His skull bones aren’t completely joined, making it easier to exit from the birth canal. However, the rest of his bones are hardening. Your amniotic fluid level is maximum, and you have more baby than fluid. So, his pokes and kicks feel strong these days. Your uterine walls become thinner, and more light enters your womb, helping your baby differentiate between day and night. His pupils can constrict and dilate in response to light. His eyes close during sleep and open while awake.
By now, your baby has got his own immune system. Antibodies are still transferred from you to your baby. The trillions of neurons in your baby’s brain are developing— your baby can listen, feel, and see inside your uterus. His sucking reflex by now is strong enough that if born early, he can feed independently. His lungs are almost mature. Fat continues to be deposited on your baby’s body, and his skin becomes less red and less wrinkled.
Somewhere around this time your doctor will check the position of the baby in the uterus.