If a pregnant woman does not fast out of concern for her unborn child what must she do? And what is the reasoning behind differentiating between her breaking her fast for her own health and that of her breaking her fast for the foetus?
The accepted opinion in the madhab of Imam Aḥmad is that if a pregnant woman breaks her fast out of concern for the foetus, she is only required to make up the fast later and the one responsible for the foetus (i.e. the father) should feed a poor person for each day. This is because the woman broke her fast for the welfare of the baby.
Other scholars say that all she is obliged to do is make up the fasts later whether she broke the fast for herself, the baby or both comparing her to a sick person. She is not required to do any more than this.
Majmūʾ Durūs wa Fatāwā al-Ḥaram al-Makkī, Muḥammad b. Ṣāliḥ al- ʿUthaymīn, Volume 3, Page 53