Is it permissible for a woman to take pills to avoid menstruation and to keep fasts?

Q. Is it permissible for a woman to take pills to avoid menstruation and to keep fasts?

A. It is not advisable for a woman to take pills in order to avoid her menstrual period. However, if she takes pills to delay the menses in order to observe fasts, the fasts will be valid. (Fataawa Raheemiyyah)