Well, they can't receive a Christian funeral. What happens to them is up to God. Orthodoxy does not speculate on this.
Does having a Christian funeral have some significance in reaching theosis? And, if the mother suddenly realized the gravity of her error, why couldn't the aborted baby have a Christian funeral? If the answer is that the baby was discarded after the killing, then I would say that many times there is no body to bury. And further, while we're on this lovely subject :), is there any view in Orthodoxy about cremation?
"And further, while we're on this lovely subject :), is there any view in Orthodoxy about cremation?"
Cremation is forbidden unless the state absolutely requires it (as in Japan.)
Some bishops will allow a memorial service (pannikhida/parastas) to be served for someone who has been cremated, but I don't think that funerals are ever allowed for someone who has been or will be cremated.
Cremation is a pagan practice that symbolically rejects the idea of the resurrection of the body.