eli5: Why does blood type not matter when choosing a surrogate mother?

Question

Organ transplants require that the donor have a blood type that is compatible with the recipient.

Why is that not a requirement when you are actually growing the organs themselves during a surrogate pregnancy?

Thanks in advance!

In: Biology

Answer 1

Women’s bodies are already ‘designed’ to carry children with mismatching blood types.

The way pregnancy works already accounts for the issue, because even a natural pregnancy will have a mismatch; unless the baby has the same blood type, either the women’s blood wouldn’t work in the baby or vice versa.