Some people say that a child is a child only when he pops out, but others would argue that life begins inside the womb at the moment of conception.
If one takes the latter view, as indeed the Chinese, for that's why they count the baby's age as one year old on the day it pops out, then abortion is as good as a mother abandoning her child, albeit unborn. You would be asking "How can" a countless number of times, and the answer would be, it's a burden to keep the child. Just kill it and get it over with.
Even some mothers would bundle up her baby, already born, and chuck it into a rubbish chute.
In old Singapore, it was not unknown for mothers to give away their babies because they could not afford to raise it, and they already had perhaps ten to a dozen. If no family could be found to take the baby, then they would just leave the baby outside the gate that today is no longer locked....CHIJ on Victoria Street. When one of the sisters opened the gate the next morning, she would see that bundle and take over the bringing up of the reluctant orphan.