The only cases i have heard of where late abortions have occured have been where the fetus would not survive outside the womb, such as anencephaly, where basically the brain has not developed properly if at all, so the baby usually dies shortly after birth. In this case the parents would be offered the choice of the baby dying whilst in the womb, or delivering then baby dies. Horrid either way, but a choice can be offered.
Usually the screening programme will identify most abnormalities early enough so that any termination can occur within 24 weeks, which is horrible to go through all the same, but at least parents have a choice, and so they should. So it is very rare that this situation of discovering defects late on happens anyway.
But this women killed/aborted what was more than likely a healthy baby. It is far worse IMO.