Omg I see that wen I get up from taking a bath I wonder
I figured it out hun it is called Abdominal Separation.
Abdominal Seperation? That sounds uncomfortable...
The abdominal muscles meet in the center front like a vertical zipper. It is very common in pregnancy for them to "un-zip." They should zip up again after delivery with some exercise. I had it with both babies.
By the way, it isn't painful at all so many don't even realize it happened.