I don't know if the Vatican has female citizens at all. Isn't the state's population (lol) just made up of clergy and Swiss Guard?
Actually according to the UN stats, Vatican City is 52% female. There a some orders of nuns there, I know.
Of the 557 Vatican citizens in 2005, 74% were clergy of some sort (10% Cardinals, 53% other ordained, remaining 11% could include nuns, I think), 18% were Swiss guard, and 8% were lay people. Of those 43 lay people, most are probably male, but any spouses of male lay people can also be Vatican citizens, meaning there are probably a dozen or so women who any abortion-related laws could pertain too, not that there would ever be anywhere to get an abortion in Vatican City.