You’re creating a twisted, unrealistic example. A pregnancy is not out of the norm and can be stopped prior to impregnating. There is no force, the person made a decision and changed their mind. Murdering a child in the process.
Imagine here is a terrible earthquake and many people need blood transfusion to survive. You happen to have the blood type O negative and know it can be used to save lives. You go to the donation center and right before the needle goes in, you panic and change your mind.
The same day a woman has a miscarriage because of trauma from the earthquake and a lack of emergency blood transfusion. Did you murder that child?
It was later revealed that this woman was 12 years old and raped by her father, but the miscarriage was judged suspicious by the authorities and are charging her with murder.
After all people who get pregnant made that decision. Pregnancy can be stopped prior to impregnation. She probably changed her mind and faked getting hurt in the earthquake. Also if she's a murderer, it's not a stretch to assume she's also a liar. She lied about her father and probably got pregnant by seducing one of her male friend.
Remember people, a child is dead! We have to investigate.