During pregnancy, your belly will only start to harden between the 19th and the 21st week. The tummy is bloated before that but is not hard because the baby is coated by vernix, which is an oily fluid which has the consistency of cheesy cream. This coat is responsible for protecting the baby's gentle and delicate skin from the amniotic fluids that our body generates.
At this stage of the baby's development, fine hair starts to grow all over the body. This hair usually stays on the baby's body till the time the date of birth is very near. This hair growth is called Lunago. Till the end of the 21st week, the baby's skeleton is still a little rubbery. It will start to harden after the 21st week. This is how your belly begins to feel harder at this point of the baby's development of bones.
At this stage of the baby's development, fine hair starts to grow all over the body. This hair usually stays on the baby's body till the time the date of birth is very near. This hair growth is called Lunago. Till the end of the 21st week, the baby's skeleton is still a little rubbery. It will start to harden after the 21st week. This is how your belly begins to feel harder at this point of the baby's development of bones.