It will never be possible to ban abortions, you can only ever ban safe abortions. For as long as pregnancy has existed, abortion has existed. The difference is though that prior to legalisation women would use unsafe methods such as "falling" down stairs, taking large amounts of drugs (legal and illegal), attempting to rupture the amniotic sac using sharp implements, visiting backstreet abortionists with poor hygiene and no aftercare, etc. Women died and it is still a leading cause of female death worldwide.
Banning it doesn't save ickle wickle bay-bees who will go on to have happy, sunshine lives full of rainbow and kittens.
It kills women.