What is the ruling on aborting a fetus for medical necessity?

The Shaykh : This questioner says: What is the ruling on aborting the fetus for a necessity and danger that the doctors have confirmed, and since she will not survive except by undergoing a procedure, and she was warned not to become pregnant, yet Allah willed it and she became pregnant? So does she make a vow? May Allah reward you with good. If it is confirmed that this fetus, if it remains, will cause harm or death to the woman, then it is permissible to abort it, but before the soul is breathed into it. When is the soul breathed in? When four months have passed. If that is the case, then it is not permissible to abort it under any circumstances. Why? Because aborting it entails killing a soul that is honored, and Allah the Exalted said: If a pilgrim performs the tawaf before the circumambulation and then performs the circumambulation afterwards, does he have to repeat the 'Umrah from the beginning?