One of the few valid reasons is having an incurable genetic disorder that will be passed on to your children. I’ve seen a woman think that her kid would beat the odds...they now cannot afford any more children due to his medical bills, he is permanently stuck at the mental age of ~8, and his life expectancy is shorter than my age.
Please get real, get screened, and consider adoption if the results come back really bad. I wouldn’t wish what happened to her on my worst enemy.
Adoption would be easier if there were kids to adopt. Kinda hard when they are all being aborted.