I stumbled upon this book at the library. The Book of Questions by Gregory Stock, PH.D. Opened it up only to to land on question number 6: You discover your wonderful one year old child is, because of a mixup at the hospital, not yours. Would you want to exchange the child to try to correct the mistake?
Now... I know there is the whole mehram, non-mehram issue. So lets say hypothetically that you were still nursing the child.