What is the wisdom behind making the waiting period (iddah) after divorce three menstrual cycles instead of one?

It is obligatory for a Muslim to believe that everything Allah has legislated has wisdom behind it, whether we know it or are ignorant of it. This is part of submitting to Allah's decree. Among the wisdoms behind the waiting period ('iddah) of three menstrual cycles are: ensuring the womb is clear to prevent the mixing of lineages, providing an opportunity for the spouses to review their marital life, and highlighting the gravity of the matter of marriage.