What is the ruling regarding a wife returning to her husband after being divorced three times without a muhallil, on the grounds that the second divorce was invalid because she was pregnant?

Firstly, if the divorce occurred three times, not consecutively, then the wife is irrevocably divorced and is not lawful for her first husband until she marries another man. However, if the divorce occurred three times consecutively with a single pronouncement, the majority of scholars hold that it is an irrevocable divorce, while some consider it a single divorce. This latter view is stronger, based on the hadith of Ibn Abbas in Sahih Muslim.

Secondly, tahlil marriage (a marriage intended solely to make a divorced woman lawful for her first husband) is forbidden, and its perpetrator is accursed. The second marriage must be a genuine marriage of desire, which then permits the divorced woman to return to her first husband after the death of the second husband or his divorcing her.

Thirdly, divorcing a pregnant woman is permissible and valid by the consensus of the scholars. There is no religious evidence preventing it, and the claim that it is impermissible is a statement about Allah without knowledge.