The change of hormone level in the body at the beginning of pregnancy causes the intestinal peristalsis to slow down, and flatulence will be produced, and this fart is a normal situation. In early pregnancy, the stomach is less able to excrete acid and the stomach acid is relatively too high; during the period from ovulation to pregnancy, the luteinizing hormone in the body gradually increases, and the luteinizing hormone makes the intestinal peristaltic ability become poor, and the excretory function decreases, so the symptoms of flatulence will appear. In addition, the placenta secretes a lot of sex hormones, among which progesterone can make the gastrointestinal tract peristalsis weaken and delay the emptying time of stomach contents, so most pregnant women feel distended and uncomfortable in the upper abdomen, and the more sensitive ones also have obvious early pregnancy reactions such as nausea, vomiting and weakness. Secondly, it has a lot to do with the consumption of some gas-producing foods, such as groundnuts, onions, cabbage, beans and other soy products, so there will be a farting situation. This can be corrected in time by drinking more warm water and eating more fresh vegetables and fruits, etc. It can be improved gradually. The farting occasionally after pregnancy is more than before, this is a normal phenomenon, just do regular checkups. If the frequency of farting is too much and the odor is big, it is also not normal, so promptly check whether the digestive function is not good.