How can having a baby w/ your full blood brother/sister affect the baby and is it illegal?

baby health image

Bella101.!

I want an honest anwser.!
because someone i know did this and i want to kno if it is illegal or not
And i want to know what is the mostly likly possibility of the babys health?

Answer
It is illegal - incest. But, the baby? Chances are good, the baby will be healthy. There's only a 2% chance of abnormalities because of it.