Consider any other medical procedure. Literally, any other medical procedure. Is there any other medical procedure that we regulate with such vigor? Why or why not?
Libertarians who support the status quo pro-life regulatory efforts have a real tough question to answer there.
I will say that I think that restrictions on abortions are a subsidy to men at the expense of women.
Ducks and Economics 
I don’t know many true Libertarians who are anti-choice. That said, nothing truer has been written than your last sentence.