Many women are unable to have a good sleep during pregnancy, there are many factors that can affect sleep, such as sleep environment, breathing difficulties, urinary frequency, mental tension, irregular work and rest. 1, sleep environment change: such as bright light, noise stimulation, air stuffiness, lack of circulation, irritating smell or other odor, or change to an unfamiliar environment, there is no familiarity, will also affect sleep; 2. Breathing difficulties: after pregnancy, the uterus will continue to increase in size, up against the lungs, which will increase the difficulty of breathing, resulting in a reduced depth of sleep for pregnant women and easy to wake up; 3, frequent urination: the increase in the size of the uterus to compress the bladder, resulting in increased urination, the sleep process is constantly interrupted, and frequent urination at night for a long time may affect sleep; 4, mental tension: there may be a variety of psychological pressure, such as family relations, fetal health condition, their role change, body size change and delivery, etc., psychological pressure increases, emotional excitement and sensitivity; 5, irregular work and rest: some pregnant women do not have a fixed work and rest routine, sometimes go to bed early, sometimes late, resulting in insomnia. In addition, incorrect eating habits can also affect sleep. Drinking stimulating drinks, such as tea and coffee, especially before bedtime can excite the central nervous system and lead to insomnia. If you eat too much at night, indigestion or eat too little abdominal hunger, can also affect sleep.