It is best for pregnant women to go to bed around 22:00 hours. Pregnant women should ensure at least 8 hours of sleep per day, which can be extended by 1-2 hours as appropriate. During the day, you can take a nap for about 1 hour, which should not be too long so as not to affect the quality of sleep at night. The human body’s deep sleep time is usually from 23:00 to 4:00 a.m. Therefore, it is best for pregnant women to go to bed around 22:00 to ensure enough deep sleep for the growth and development of the fetus. During pregnancy, it is easier than usual to feel tired and sluggish, so you must pay attention to more rest and keep enough sleep, you can drink a cup of warm milk before going to bed, listen to soothing music and so on, to improve the quality of sleep. If you often go to bed late or stay up late during pregnancy, it is easy to lead to disorders of the biological clock and changes in the body’s internal environment, affecting the growth and development of the fetus. Therefore, good sleep habits during pregnancy is very important, regular work and rest is conducive to the physical and mental health of pregnant women and the fetus.