Hiccups in pregnant women are usually related to diaphragmatic irritation, indigestion and intestinal flora disorders. 1. Diaphragm irritation: After pregnancy, the uterus will gradually increase in size due to the continued growth of the fetus, resulting in the compression of the abdominal organs. When the stomach is squeezed by the uterus, it may irritate the diaphragm, which may cause spasm of the diaphragm and hiccups. 2. Indigestion: pregnant women hiccups can not be ruled out due to gastric peristalsis slowed down due to indigestion, will be due to the presence of food in the stomach for a long time, and the digestive juices produce a lot of gas, hiccups and farting symptoms. 3. Intestinal flora disorders: some pregnant women may have basic gastrointestinal diseases, which may cause intestinal flora disorders, the reduction of beneficial bacteria and the increase of harmful bacteria will make the intestinal tract to produce undesirable gases, which will lead to abdominal distension, hiccups, belching and other symptoms. Pregnant women hiccup phenomenon should be based on the symptoms of pregnant women, if necessary, with the doctor to give the appropriate treatment, need to avoid blind use of drugs.