I think we need to regulate penises. And ONLY penises. Oh, let's also restrict the availability of resources available for men, and force men to get a psychological screening before they have sex. Every time. Now, I concede that pregnancy and sex are two different things, yes, but in context of the genders at hand, if men can't control the location in which their dicks are inserted, then it's no different than women being able to control their ovaries. Obviously. It's not like they're forced to ejaculate or even knowingly do. Therefore, let's have government screw with the personal lives of all men, and make their lives tougher overall.
On a serious note, my favorite argument for abortion is the one present by Steven Levitt, Professor of Economics at the University of Chicago and author of Freakonomics. If you've read the book, then you would know of the Donohue-Levitt Hypothesis which is the theory that legalized abortion contributed significantly to the falling crime rates in the 90s, which if you are from the USA, was a huge deal as many economists and sociologists were predicting "blood in the streets" during that same time period due to the rise of cocaine and crack and the crimes that came with it in the 80s. Now, correlation does not imply causation, which is a fundamental rule in statistics. However, a correlation can be a good indicator of a contributing variable among several other ones. Anyways, the main argument Professor Levitt offers is this: that mothers knew the situations they got themselves into, and took the responsible response and aborted their fetuses. Although disgusting, it is true that the majority of crime occurs in areas of poor, ethnic, urban neighborhoods, which also have women whose children will be more susceptible to crime due to these poor conditions. By aborting their children, oftentimes the mother-to-be were making a conscientious and logical decision to better themselves, and also to prevent their child from experiencing the horrors of reality. It's not about preventing the death of some future "Beethoven" or "Steve Jobs," but about true parenting and sacrifice. This is, in its own way, beautiful, and no government regulation should stand between a woman and her own difficult decision.