I think for muslim women they can choose if they want to, and i know at least 2 who did. They only did it in the middle trimester and if they felt unwell on it they did take some water. For most of my muslim friends it depends what season Ramadan is falling, how far along they were, and how good their pregnancy was going generally. One girl i know told me the town in Pakistan where she was from MOST women did fast during pregnancy and breastfeeding (you can't fast if you have lochia still anyway, so most never fasted if ramadan happened to fall in the first 4-6 weeks of breastfeeding)

IN many many parts of the world women live on FAR fewer calories that we in the West do. Many have to go days without food, and sometimes days without water, weeks, months, years, lifetimes without clean water. It's not ideal, but it hasn't wiped the human race out yet. I think in the situation of Ramadan, where a woman is able to eat and drink amply and healthily during the 24-hour period, just not during daylight, it's probably not dangerous for healthy women having normal pregnancies.

Bx