Rationality in an baby in the womb is irrelevant. We have seen examples of irrational behavior in the 2016 election, for example, with Bob Schieffer actually expecting his audience to believe that Bill Clinton’s rapes and sexual abuses were “relationships”, and another media presstitute, a female, calling them “affairs”.
If you don’t remember your time in the womb, you don’t remember your first day. I’ve raised ten children and partially raised five more. Some were active, some were not, and studies show that the mother playing (Baroque at least) classical music while pregnant is associated with higher scores on intelligence tests.
EVERY SINGLE CHILD while still inside that warm mother’s womb has his own individual personality. Each newly conceived baby is a whole new human being.