1. Causes of loss of appetite in pregnant women: Loss of appetite in pregnant women is one of the common symptoms during pregnancy, and there are many reasons for it. It may be due to changes in hormone levels, or it may be due to changes in the function of the gastrointestinal tract. In addition, excessive stress, pregnancy reactions, etc. will affect the appetite of pregnant women. 2. The impact of loss of appetite on the fetus. Loss of appetite in pregnant women will lead to insufficient nutritional intake, thus affecting the fetus.