Governments would have to be willing to take all of them as wards of the state. Before that, we would have to make sure it was just as safe as an abortion. After that, we would have to consider if this mother has a right to not allow this lump or cells to not grow into a full grown human who has to grow up as a ward of the state.

All of these questions apply at 6 months or whatever arbitrary date you set. Birth is a more dangerous and damaging procedure than abortion. If forcing the test tube baby extraction could be disallowed for danger, why isn’t forced birth?