When gastroenteritis occurs in pregnant women, it can have no effect on the fetus if it is mildly affected by reasonable dietary adjustments and timely recovery. However, if it is so serious that it needs to be treated or delayed, it can affect the fetus and the pregnant woman to some extent. The fetus will be affected by the lack of appetite due to gastroenteritis, resulting in inadequate nutritional intake and water-electrolyte disorders, which will affect the normal growth and development of the fetus; 2. The first of these is to make sure that you have a good idea of what you are getting into. In addition, some pathogenic bacteria can cause miscarriage in pregnant women, such as Listeria monocytogenes, which can lead to intrauterine infection in pregnant women and increase the risk of miscarriage, Salmonella untreated can cause dehydration, shock, and sepsis in individual patients; 2. Premature birth: Gastroenteritis in late pregnancy can cause premature birth in pregnant women, and poor living skills in premature babies can lead to complications such as pneumonia and cerebral palsy. So throughout pregnancy, pay attention to eating clean, fresh and easily digestible food, do not eat leftovers and indigestible food, and do not eat cold drinks and cold food stored in the refrigerator. Eat more fresh fruits and vegetables, consume food as light as possible, ensure adequate daily intake of vitamins and proteins, and have regular pregnancy tests to keep an eye on the fetus.