One third of all pregnancies end in a spontaneous abortion or, as it's more commonly known, a miscarriage. If God doesn't believe in abortion, why do women miscarry?
This notion that abortion is murder is a recent invention of right wing zealots. There is no prohibition in the Bible to a woman ending a pregnancy or inducing a miscarriage. In fact, there is a passage on scripture that says if a man harms a woman who is with child and she miscarried, the man shod pay compensation to the child's father, but if the woman should die from the attack, then the man is a murderer and should be punished as such.
Abortion isn't a matter of convenience. By and large, it's a matter of economics. Half the women who have abortions are married and already have other children, and cannot afford another mouth to feed, or cannot afford time off work to carry and give birth to the new baby.
Only in the minds of right wingers are abortions a matter of convenience. The truth is much sadder.
Right wingers think that if a woman doesn't want a baby, she should keep her legs closed, or undergo unnecessary surgery to have her tubes tied, rather than tell men to keep it in their pants.