Abortions don't happen in typical pregancies, they mostly happen in unusual ones. Different kinds of unusual pregnancies. You could look at the most common clus

Abortions don't happen in typical pregancies, they mostly happen in unusual ones. Different kinds of unusual pregnancies. You could look at the most common clusters and ask the question of those, and the answer varies, a lot. But if you look at those cluster, I don't think you'd be eager to set limits specific to any of them. There's one, for example, where the pregnancy is nearly always discovered very quickly: Couples who want children, try to conceive and eventually get some sort of medical help. Those pregnancies are discovered reliably and early. But then, when the treatment works if often works so well that there are twins or even triplets, and the reasons that made conception difficult in the first place often affect carrying triplets to a successful birth. Aborting one of the three would improve the chances for the other two, and the mother. Would you set a time limit at all? Remember: Any constraint you put on that is going to lead to couples not getting the help they want, because the clinic's going to tell some couples that the risk of needing an abortion is too high to even start fertility treatment. And this is a type of abortion where setting a limit is fairly simple — the pregnancies are discovered early and there's medical supervision from day 0. Other common types of abortions are more difficult.