Some pregnant women may have hiccups in the early stage of pregnancy, which is generally related to the changes of hormone levels in the body and the development of the fetus. 1. Changes in hormone levels in the body: when a woman is pregnant, the hormone levels in the body will change, which will cause the peristalsis of the gastrointestinal tract to slow down, making it easy for intestinal flatulence to occur, which will lead to hiccups in the early stages of pregnancy. 2. Fetal development: with the gradual development of the fetus, the uterus will gradually increase, usually when the pregnancy five months, the uterus will be more than the navel, gradually leading to the intestines, stomach and other organs of the space occupied by the uterus, it is easy to pressure to the large intestine or the small intestine, resulting in peristalsis slowed down, resulting in hiccups in pregnant women. Generally pregnant women in the early stage of hiccups is mostly normal phenomenon, without special treatment, but if the hiccups do not ease, should seek medical attention to identify the cause of the disease and then treatment.