In normal circumstances I totally agree that no parent should try to force a child (in fact no person should try to force another person) to have an abortion.
But there can be some weird twists in this issue - some people are far more dependent &/or easily led or threatened (by parents/partners & others) into doing what someone else wants them to do be it abortion, adoption or keeping a child. Note I also do not think that anyone esle should force a person to keep a child (either stop an abortion or an adoption!!) - but these days there are so many legal issues - father's rights, mother's rights grandparents rights - & remember if a father or grandparent forces a person to have a child they may in fact not be the ones left to raise the child despite what they say - so it is a mine field in so many ways & it is getting worse.
Then take into account different religious views, laws in different countries & things just keep getting more difficult.
Then there are questions of what a parent should do if their daughter is pregnant & too ill to make her own decision? Or if their daughter is mentally incapable of making such a decision? I don't know what I would do, I guess it would depend on my daughter's medical condition, that if the baby, the effect of the pregnancy on my daughter etc.
Adoption is an option that is all too often & sadly overlooked these days by everyone which is wrong.