Question

Why can't two person's from the same family have children together?​

Answer 1

Answer:

They can have children together. If they are married or in a relationship they can do anything they want together including the want of children.

Explanation:

Answer 2

When parents are blood relatives, there is a higher risk of disease and birth defects, stillbirths, infant mortality and a shorter life expectancy. To have a child with severe diseases and disorders may cause heavy strain for the family in question.