Farting odor may be related to improper diet, constipation, indigestion and other factors, and is not necessarily related to pregnancy. 1. Improper diet: Eating a lot of food containing protein and fat. Proteins and fats produce more hydrogen sulfide when they are digested in the intestines. Hydrogen sulfide has a very strong odor, which leads to the smell of exhaust gas. 2. Constipation: Constipation will cause food residues to stay in the intestine for too long, and a large amount of food will be decomposed and fermented by microorganisms in the intestine, which will also lead to a large odor of the exhaust. 3. Indigestion: When you suffer from indigestion due to intestinal flora imbalance, the inadequate decomposition of some foods will also produce more sulfurous gases, making the odor of farting bigger. In addition, pregnant women farting odor may also be related to other factors, pregnant women should follow the doctor’s advice on time obstetric examination, if any discomfort, it is recommended to go to the hospital in a timely manner, in accordance with the doctor’s instructions to deal with the treatment.