(July 18, 2018, 3:50 am)motofoko Yes multiple reasons, most mentioned already and I would add medical issues. But the main reason as I see it is money = the low demand. The market for this material is simply not strong enough to attract more supply.
this. a famous, mainstream pornstar wouldn't need to cater to the pregnant fetish market if they're big enough. though this fetish os more common than most people think, it's still a niche market compared to, for example, interracial stuff.
it just isn't really worth their time.