If the fetus has no chance of survival anyway/already dead: Hopefully no one is against this; any stage
If the fetus can be transferred to an artificial womb or incubator with x % chance of survival: any stage (x required goes up as the technology improves; it needs tested on human fetuses anyway)
Rape or mother and father no longer together: Am unsure if ever without one of the above exceptions
Anything else: No, not without one of the above exceptions
In addition though, provide free sterilizations, birth control, and anything needed for a child for anyone desiring. If any couple has had more than two pregnancies to term, sterilize them. Make the chemtrail conspiracy of spreading anti-fertility chemicals true. Make all medical care free (along with any painkillers during birth).