Fasting: Menstruation During a Vowed Fast — What’s the Ruling?

Practical Laws of Islam as per the teachings of Imam Khamenei

Fasting: Menstruation During a Vowed Fast — What’s the Ruling?

English:

Question #820:

If a woman’s menstrual cycle starts while she is fasting on a specific day that she had vowed to perform, what should she do?

Answer #820:

Her fast is void because of the menstrual cycle, and she has to perform its qaḍā’ after she is clean again.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Fasting