I still don't like the potential v actual separation in this case. It fails to account for the fact that a perfectly healthy baby born after the appropriate gestation period is still 100% reliant on the mother to survive for years. If self sufficiency is the arbitrator, it will be different for quite literally everyone.The potential mother is an actual living breathing, biologically independent girl/woman though......Whereas the foetus if fully dependent upon her womb.
Therefore.....One has rights & the other doesn't.
We have no choice about our parents or the station or situation into which we are born into.....Or not born into, as it holds....Such is the nature of all life.