Pregnant women 8 months are a little too late to sleep may be bad sleeping habits, mental stress, frequent urination, calcium deficiency, other physical discomfort and other reasons. 1. Poor sleeping habits: pregnant women have the habit of staying up late at night, sleeping longer during the day, it is easy to sleep at night, manifested as a little more than sleep. 2. Mental stress: 8 months pregnant into the late stages of pregnancy, due to the imminent delivery, many pregnant women are afraid of the pain of labor and delivery will be nervous, anxious, resulting in pregnant women to fall asleep difficult to sleep is getting worse and worse, may be up to a point to go to sleep. 3. Frequent urination: 8 months pregnant uterus will gradually increase in size, pressure on the bladder may have frequent urination performance, often go to the toilet at night, may have to wait until one o’clock to sleep. 4. Calcium deficiency: late pregnancy, the fetus and the mother’s demand for calcium is relatively large, the body lack of calcium will increase the excitability of the nerves, night cramps and other symptoms, affecting sleep may also wait until one o’clock to go to sleep. 5. Other physical discomfort: after 8 months of pregnancy, pregnant women may experience physiological fatigue, back pain, limb edema and other discomforts, physical discomfort will also affect the quality of sleep, wait until a little too late to sleep. Pregnant women should find out the reasons for their insomnia, and then targeted treatment.