The fasting of breastfeeding women

Q: What is the duty of the breastfeeding woman during the month of Ramadan?
A: Fasting won’t be obligatory for her assuming (a) her fasting will decrease her milk supply and thus frustrate the infant or (b) she, herself, becomes harmed by means of it. Assuming she doesn’t fast because of (a), she must donate ¾ kg of food (namely wheat, barley etc.) to a needy person (as described by the canon) for every day which she hadn’t fasted. Concerning (b), such a ruling is decreed via obligatory caution. In any case, be it (a) or (b), she must observe the required compensatory fasts.