What is the ruling on prayer and fasting when menstrual bleeding recurs due to birth control pills?

Question:
Your Eminence the Shaykh, the questioner says — or rather, this is a woman asking, and she says: What is the ruling on the disruption of the menstrual cycle caused by taking birth control pills? These pills have caused blood to come at close intervals, which may reach ten days. What should the woman do regarding prayer and fasting when the blood comes repeatedly due to this excuse, that is, every week or less, or more than ten days, and it does not occur every month as is known among women?

Answer:
If the cycle is changed by the cause of pills, or by the cause of illness, or by falling from a height, or something similar — the point is, if it is changed by the cause of illness or something else, or pills or something else, or an IUD or something else — she must adhere to her usual custom. If the known custom of five, six, or seven days comes every month, she does not pray and does not fast. And when the custom ends, she performs the full ritual bath and prays and fasts. And whatever blood comes with her from corruption, she prays and fasts with it, and performs the ablution for every prayer.