Question: Is a mother allowed to abort the feotus, if she does not want it while the soul has not yet entered it and there is no serious danger to the mother’s life?
Answer: She is not allowed to do that, except if the continuation of the pregnancy would considerably harm her health or put her in an unbearable difficulty, then it is permissible before the soul enters the feoutus (i.e. the fourth month).
Ayatollah Al-Sayyid Ali Al-Husseini Al-Sistani