That's hot. I bet you'd only maybe have to have sex to get only maybe pregnant. Nobody manufactures double-slit experiment pregnancy tests so it'd be really hard to tell if you are. It's probably impossible to get rid of one since there aren't enough medical doctors that are also quantum physicists. There's also no way the system is designed to handle maternity leave that isn't maternity leave.
Imagine what that mystery belly does to your social life. Whether people mistake you for pregnant or think you're just a fatty, you can only 50% chew them out at most. Nobody's going to throw you a chance-of-baby shower. Where do you even get maybe-baby clothes? Will your breasts swell with maybe-milk? Good luck tracking down the father that might not exist and roping him into maybe-arriage.
How do you even give birth to a baby in a superpositioned state? Who's gonna do the math to figure out how dilated you are? What if you're actually pushing when you need to be possibly pushing? Do you just hold it in and hope it stays in a state of perpetual quantum uncertainty?
How long can you stay overdue and not overdue at the same time? Is a potential fetus smaller than a definite fetus? Do you spend the rest of your life in potential labor, hoping nobody ever gets a glimpse between your legs and collapses the waveform, sending you into actual labor? What if you struggle with your hugely expectant body for years only to deflate like a balloon because you were never actually pregnant to begin with?
Being Schrodinger's catgirl must be the absolute worst.