Question

What happens if mother and baby blood group is same?

Answer 1

Nothing bro and generally they both have same blood group

Answer 2

The letters A, B, and O refer to the four blood types— A, B, AB, and O. Blood type is determined based on proteins on the surface of red blood cells. These proteins are potential antigens—substances the immune system doesn't recognize. For protection, the immune system will create antibodies to fight off the unfamiliar protein. These antibodies can cross the placenta, where they will break down the baby's red blood cells after she's born.