In the future, because of bad things we did to the atmosphere and stuff, miscarriages are the common ending of a pregnancy, instead of being the exception. One evil company finds a way to accelerate the process by using 10 women, lowering the chances of miscarriage simply by reducing the time in womb.

I thought, something like a medication helping the women develop the baby in 30 days, but seriously damages the host in a couple of days, so the fetus gets transferred from host to host. Some die, but the evil rich don't care. Your idea could also work though.

I realize that this is totally the wrong corner of the internet to post this but I guess today I'll just go with it.