What are the consequences for a woman who forgot to take her birth control pills at night during Ramadan and took them an hour after the Fajr Adhan, fearing pregnancy: Does she have to make up the day (qada') or fast for two months?

A woman is obligated to make up for the day's fast if she took a birth control pill after the dawn (Fajr) prayer, while being aware of her fast. However, if she took it forgetfully, then there is nothing upon her and her fast is valid. It is permissible to use contraceptives under certain conditions.