system
Given the following post, respond as if you're commenting on Reddit:
human
If while pregnant Mystique turned in to a male then back to her normal self, would she still be pregnant? What would happen to the fetus while a man?

I searched and there are A LOT of Mystique questions including those relating to her being pregnant or impregnanting someone while transformed into a male but not transforming while pregnant.  Like I said, there were a lot of threads so maybe I just missed it.
gpt
I think the general consensus is that her changes are just a little more than skin deep. She would still have her female internal organs, her outsides would just shift around to make her look like a dude.