When can a menstruating woman fast?

Fasting whilst breastfeeding is valid

Can a woman whose fast is broken because of menstruation in Ramadaan eat?

She was not certain that her period had ended, and she prayed and fasted

It is not permissible for pregnant and breastfeeding women to break the fast unless they fear for themselves or their children

If a pregnant woman feels a bit tired can she break her fast?

Her period comes twice a month – should she stop praying and fasting each time?

Fidyah for Missed Fasts Due to Pregnancy and Breastfeeding

Is it better for her to break her fast so she can breastfeed her child or to stop breastfeeding so she can fast?

40-Day Rule after Birth in Islam: When Can Women Pray and Fast?