What is it that you don't understand though
The woman has to carry the baby. She has to give birth to the baby. There are complications involved in having a baby. But she should have the baby just because a man wants her to?
"Don't have sex if you don't want to get pregnant"
Well, honey, if you're a man and you want a kid, and you have sex, you know there's a risk of the woman getting an abortion. So I guess we should all just stop having sex and let humanity die.
Basically: if it's a woman's responsibility not to have sex in order not to get pregnant, then it's also the woman's choice to terminate the pregnancy.