Is it permissible for a woman whose menstrual bleeding does not stop due to an implanted contraceptive to fast and make up for the days of Ramadan she missed before the arrival of the holy month, or is expiation permissible for her?

The maximum duration for menstruation is fifteen days. If the blood flow exceeds this period, the woman becomes a mustahadah (one experiencing irregular bleeding). A mustahadah has the rulings of pure women. The questioner must make up the Ramadan fasts she missed before the next Ramadan begins, and she should fast the days she was a mustahadah; her fast will be valid. She is obligated to pay fidyah only if she broke her fast out of fear for her child. It is not permissible to resort to feeding the poor as long as she is capable of making up the fasts. If she delays making up the fasts despite being able to, until the next Ramadan begins, then she is obligated to pay a fidyah of feeding one poor person for each day of delay, according to the majority of scholars, unless she was unaware of the impermissibility of the delay.