You get preggers, you get what you get. That's my opinion.
If you are in a position where you have trouble getting preggers, then perhaps if there's a choice, you might as well make one. But since I don't have a preference, and I think that someone who gets born they way they are born are the way they are, it's not up to me to use a cheatcode.
But at the end of the day, I couldn't care less. I know they change genders of dogs these days because the owner of the dog thinks the dog is happier as a girl .. personally I think that's simply ridiculous, but having any opinion other than the ones people post on facebook and you're now an old fashioned close minded person .. i've learned in a world of feminists who hate men without ever having met one is i have no valid opinion. I gave up caring.