Do Pregnant Bellies Shrink?
Imagine your abdomen as a balloon, slowly inflating as your baby grows. Childbirth doesn't pop the balloon; it just starts a slow leak. But don't worry – it's a steady one. From the moment your baby is born, hormonal changes cause your uterus to contract, shrinking it back to its pre-pregnancy state.
Strong abdominal muscles mean a growing uterus is going to stay closer to the core of the body, Kirkham explained, making a bump appear smaller. On the other hand, if core muscles have been stretched out from a previous pregnancy, a second or third pregnancy baby bump may look larger.
Baby bumps aren't the same size — here's why - National | Globalnews.ca
Is it normal for belly to get smaller during pregnancy?
Yes, it's most likely normal to have a small baby bump. You may feel like you don't look pregnant yet, even if you're already into your second trimester, but it's important to know that there isn't a specific time when moms-to-be are supposed to start showing.
Is my small baby bump normal? - BabyCenter