Along with the previous argument here is a thought experiment to demonstrate that a person does not always possess the right to do wahtever with what he owns.Because medical abortion (ie through drugs) may be preferred by the woman, and it's her body, her choice, and she's a legal person.
"I am a billionaire in draught ridden LA. I legally buy 70,000 gallons of drinking water and plan to pour it down the drain as a personal preference. Does the state, whose citizens value drinking water highly, have the right to violate my property right and put a legal injunction against me doing this?"