Fatwa #161822 November 2000Pakistan
How should she conduct herself? What if she stops menstruating during fasting?
Question
A female starts menstruating while fasting.
Answer
If her menses commenced while fasting, she can eat (not in public). If her menses stopped while fasting, she should abstain from eating, drinking, etc. but (in both instances) make up for the day by keeping a Qadhaa fast after Ramadaan. (Aalamgiri vol.1 pg.214; Rashidiyya)