All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
Abortion is forbidden during all the stages of the development of the foetus; even as a sperm as this is damaging to human reproduction. If the soul is breathed into the foetus, then this is more forbidden as this is killing a soul without right. Therefore, it is not permissible to carry out an abortion except for a necessity. So, you should know that you have indeed committed a sin by doing so. You should have asked the scholars before committing this abominable act. Though you might not be sinful for not knowing that it is forbidden, you still have to give blood-money unless the heirs of the foetus forgive. The blood-money for the foetus is one tenth of the total mother's blood money, which is the equivalent of the value of 5 camels. It is safer and more appropriate to expiate for abortion to avoid the difference of opinion of those who are of the view that the expiation is obligatory. If the one who carried out the abortion is from the heirs then he does not inherit anything from the blood-money. As regards the person who was not directly involved, he does not have to give blood-money, but he has to repent.
Allaah knows best.