as for your women who have lost hope of menstruation and in case you have a doubt the prescribed period for them is three months as also for those who have not menstruated yet. as for those who are pregnant their prescribed period is until the delivery of the child. god will make things easy for him who is mindful of god.
واللائي يئسن من المحيض من نسائكم إن ارتبتم فعدتهن ثلاثة أشهر واللائي لم يحضن وأولات الأحمال أجلهن أن يضعن حملهن ومن يتق الله يجعل له من أمره يسرا