The performance of sleep snoring during pregnancy is usually related to the increase in weight and changes in hormone levels after pregnancy, for the following reasons: 1, weight gain: by the middle and late stages of pregnancy, pregnant women gain weight faster leading to obesity and snoring while sleeping. Pay attention to weight control and avoid excess nutrition; 2, poor breathing: the growth of the pregnancy week, the fetus increases in size, the uterus increases in volume, making the diaphragm rise, narrowing the respiratory tract, poor ventilation during sleep will cause snoring, more obvious when lying down. It is recommended to adjust the position in time, especially in late pregnancy should be preferred to rest in the left side; 3, the level of progesterone change: after pregnancy due to changes in the level of progesterone, nasal capillaries dilate, nasal turbinate hypertrophy, sleep snoring situation. Pay attention to keep the nasal mucosa clean and moist. In addition, a pillow that is too high and makes the head and neck excessively bent can cause snoring. If the symptoms of snoring are serious, or even if you are holding your breath, you need to consult a doctor early to find out the cause so as not to affect the growth and development of the pregnant woman and her fetus.