My wife is pregnant. Does she need to fast and if not what is she supposed to do instead?
If a pregnant woman fears that fasting may harm her or her baby, then she should follow the ruling of one who is sick. Thus, a sick person is exempted from fasting. So she may break her fast and she has to make up the days that she did not fast. But if she does not fear that she or her baby may be harmed by fasting, then she has to fast.