My sister suffers from cysts in the uterus. She observed fasting for two days in Ramadan although there was a daily discharge of menstrual blood whenever the time of the azan (call for prayer) was due. What should she do? Should she make up for three days of fasting?

All perfect praise be to Allaah, the Lord of the worlds. I testify that there is none worthy of worship except Allaah  and that Muhammad, sallallaahu ‘alayhi wa sallam, is His slave and Messenger.

If the discharged blood was menstruation, as it is clear from the question, and it was discharged during any part of the daytime of Ramadan, at the beginning or the end, then her fasting is invalid. For the woman's fasting to be valid, it is conditioned that she experiences neither menstruation nor post-partum bleeding. Since fasting is invalid in this case, she has to make up for these days of fasting.

Allaah Knows best.