What happens when one conceives a child while polymorphed into another species?

I can’t imagine that it’s addressed explicitly, but I wonder:

Is there anything in either Pathfinder rules or Golarion lore to suggest what happens when someone who’s polymorphed into another species conceives a child? e.g. if a male human Alter Selfs into an elf and then conceives a child with a female elf, does the elf mother give birth to an elf or half-elf?