"And those of your women who have despaired of menstruation, if you are in doubt," meaning: if you are in doubt, "then their waiting period...
﴿وَاللَّائِي يَئِسْنَ مِنَ الْمَحِيضِ مِنْ نِسَائِكُم إِن ارتبتم﴾ شَكَكْتُمْ (فَعِدَّتُهُنَّ
