This is the whole reason why we need to develope a "pregnancy vaccine." It should be safe, effective, free, and completely reversible. It should be available to anyone who wants it. It should be made to work for both males and females who want it.
It would take two people who both wanted to have a baby to have a baby.
It would end the "mistakes." It would make abortion obsolete. It wouldn't matter if abortion was legal or not. We just wouldn't have anyone seeking an abortion.