In Islam, iddah or iddat (; period of waiting) is the period a woman must observe after the death of her spouse or after a divorce, during which she may not marry another man. Its purpose is to ensure that the male parent of any offspring produced after the cessation of a nikah (marriage) would be known. The length of iddah varies according to a number of circumstances.

In Islam, iddah or iddat (; period of waiting) is the period a woman must observe after the death of her spouse or after a divorce, during which she may not marry another man. Its purpose is to ensure that the male parent of any offspring produced after the cessation of a nikah (marriage) would be known. The length of iddah varies according to a number of circumstances.