Is it obligatory for the wife to fast in Ramadan, given her fear of recurrent miscarriage, and in light of the doctor's advice against fasting for all pregnant women due to its effect on fetal growth, especially since her first pregnancy miscarried at the same gestational age without a known cause?

Your wife is permitted to break her fast in Ramadan if a trustworthy and skilled female doctor informs you that fasting will affect the fetus. She must make up the days she missed. Additionally, according to the Hanbalis and the well-known position of the Shafi'is, she must feed a poor person for each day she missed, a view that differs from that of the Hanafis and some Malikis.