Is the prayer of one for whom turbidity appeared after purification from menstruation valid, and is the prayer of those she led valid?

If a woman becomes aware of the discharge of brownish discharge (kudra) during prayer or before it, her ablution (wudu') becomes invalid, and her prayer is incorrect. As for the prayer of the congregants (ma'mumeen), it is valid unless they were aware of its discharge. If the woman was unaware of the exact time the brownish discharge occurred, her prayer is valid, because the general rule is to attribute the impurity (hadath) to the nearest possible time.