Er...I'm not certain of it, I'm sure it's been more, but when my mother had my sister she was told that she could not safely carry another baby. Or her womb would burst through her scar due to the delicate scar tissue. She had three. So, I believe that once the scar tissue is cut open the second time, it's far too weak to hold in another fetus. So...After three children, I would not recommend going for another.