Is the husband entitled to refrain from paying the deferred mahr to his wife after discovering, subsequent to the marriage, that she suffers from a disease preventing procreation, and is this considered a defect invalidating the marriage contract?

The majority of jurists agree that infertility is not a defect that warrants the option to annul the marriage contract. The woman is entitled to the full prompt and deferred dower if consummation has occurred. If consummation has not occurred, then she is entitled to half of what was stipulated.