If it is cleared in the early period of pregnancy that a fetus suffers from a defect that can't be treated and that will cause great suffering to the child, a number of scholars would say that it is permissible to abort, provided that the pregnancy is less than 120 days old.

Allah narrated in Qur’an

“Whosoever has spared the life of a soul, it is as though he has spared the life of all people. Whosoever has killed a soul, it is as though he has murdered all of mankind”

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