What if the problems aren't clear until the child is born? Or a toddler, or a teen? There's still a lot we don't understand about prenatal environment and how it contributes to the attributes someone has as an adult.
The child always has the option of suicide if it really thinks it would be better off not existing. This is fine for the same reason that not aborting kids with downs is morally fine.
One of the best arguments for allowing abortion is that we do not force anyone to risk their integrity and life for another person, which is what pregnancy is. This argument won't work anymore.
Yes, it will be wonderful to have equality of the sexes again. If women don't want to pay child support they should just not have unprotected sex, like men.
Or we do the sane thing and stop treating clumps of cells like people.