When you are pregnant when does your belly button pop out?
When the baby's done! No, it doesn't always happen. There is no
way to predict whether or not your belly button will pop out
pregnancy to pregnancy and is mostly related to the position of
your baby. Some women are quite annoyed by this and will even tape
their belly button flat to their pregnant bellies. It is helpful to
know that your belly button popping out can be normal and is not
harmful to you or your baby.