Okay so I'm going back on my word but seriously
I disagree; I think health issues will improve. Since abortion would be illegal, less people would be willing to try it in a back alley. The less the abortions, the less the medical problems and the less the infant deaths.
Seriously what crack rock are you smoking
Legalizing something, in practice, allows better regulation.
For instance, in my city, in a particularly seedy part of town known for crime, the government has set up "safe injecting rooms."
These are supervised, clean rooms where junkies can shoot up.
They won't be arrested for doing drugs if they use one of these rooms. In other words, it's not a trap.
The idea is that people are inevitably going to do drugs. There is a problem with drugs in this area.
These rooms allow drug users to minimize the risk of taking drugs.
Another similar example I can think of is cigarettes.
In my country, all cigarette packets have plain packaging (that is, no brand logos, no flashy colours. Just a brown box with the name of the cigarette on it, covered in confronting health warnings.)
People don't like the health warnings. They're quite disgusting. Cigarettes are also heavily taxed here.
I know of a place where I can buy regular packaging, cut-rate cigarettes. Of course, this is illegal.
My point is this:
If something becomes legalized, governments can regulate the object or action. This means that the action / object is less risky, and in many cases, less desirable. For instance, the American states of Colorado and Washington have legalized marijuana usage,
and now they're regulating it.
This means that those state governments can put in health guidelines, tax marijuana so that the price becomes an even bigger deterrant, and the quality of the drug can be standardized. All of these are good things.
Or take the opposite. Prohibition in the '30's didn't stop people drinking alcohol. And the alcohol being produced was often of questionable quality. Not to mention Prohibition fostered the growth of huge crime syndicates.
Abortion being legal is a good thing. It means that governments can regulate the process; ensure that those who carry out abortions adhere to guidelines designed to make it a safe process.
Illegalizing abortion will inevitably see the growth of illegal abortionists, who would ultimately have nothing stopping them from carrying out abortions in very unsafe conditions.
Remember that for most of human history, abortions have been illegal. It hasn't stopped people from having them. Abortions have always been a significant health risk... Until now.
So really
I think health issues will become endemic. Since abortion would be illegal, more people would be resorting to do it in a back alley. The more regulated abortions, the less the medical problems.
Disclaimer: this is in some ways a defeatist argument. In an ideal world, if something was made illegal than people wouldn't do it. But that doesn't happen. Please don't twist my words.