Making it illegal would be a terrible idea.

It would most likely lead to "backyard" abortions which could be done poorly and result in the pregnant womens death or injury.

Also it is taking away a persons right. A women should not be forced to carry around an unwanted parasite for 9 months. Women are not baby farms they are people (nobody disagrees on that). And by taking away their right to abortion they are having their lives severly damaged by unwanted pregnancies.