system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Polyjuice potion sexy times

In theory, could a man become a woman through polyjuice potion and become pregnant or could woman become a man and impregnate a woman? If so what would the results be? And how would the genetics work?
gpt
>could a man become a woman through polyjuice potion and become pregnant

Not unless he took the potion for long enough for him to menstruate, have sex, and then carry the baby to term. This could have disastrous results however, as if you miss a dose during the pregnancy, you'll change back to a man, and the baby will find itself somewhere with your urethra or vas differens, an undesirable place for it to be for the both of you.

Either that our you'd just have testes where the ovaries would normally be.


EDIT: As for the genetics part, if a woman turned man were able to produce sperm, she would still only make them with an X chromosome. If she/he paired with a woman, only girls could be produced. If she/he paired with a man turned woman, either sex could result, just like a normal pregnancy. 

If it were a man with a man turned woman however, there would be a 1 in 4 chance of it being a normal girl, a 1 in 2 chance of being a normal boy, and a 1 in 4 chance of being conceived with 2 Y chromosomes. A child with two Ys would likely result in a miscarriage very soon, but we don't know as this cannot occur normally in humans.