Belly expansion to the max Video DailymotionIn a delicate condition womb enlargement during maternity is a natural process. The mother's belly gradually gets larger. Such tummy extension during pregnancy is a beautiful symptom of the miracle of birth. As the baby grows, mom's bump stretches, forming a noticeable sign of the impending arrival. It is an invaluable period in mom-to-be to observe growing as the baby thrives.