It is narrated from Mu’ammar that Imam Zuhri, may Allah have mercy on him, said: When a man divorces his wife and after one or two menstruations she stops (menstruating), and this cessation is due to old age, then she will complete three months of ‘iddah. And if she is of young age and falls into doubt, then after the doubt arises, she will observe ‘iddah for one year.