What time to go to bed is not called staying up late? Generally after 23:00 to go to sleep is called staying up late, before going to sleep is not called staying up late. Occasionally staying up late has no effect on the organism, but staying up late for a long time causes serious harm to the organism. Nowadays, many young people like to stay up late, so pregnant mothers stay up late in pregnancy to have an impact on the fetus? The answer is of course there is an impact, the impact factors are mostly seen in the following aspects: first of all, staying up late will lead to endocrine disruption in pregnant women, affecting the normal metabolism of the body, and is not conducive to the discharge of waste in the fetus, affecting the absorption of nutrients in the fetus, which is not conducive to the normal development of the fetus, affecting the size of the fetus and leading to other complications. Secondly, pregnant women stay up late for a long time will make them mentally fatigued, inattentive, immune function decreases, increasing the risk of pregnancy illness; furthermore, staying up late for a long time increases the risk of miscarriage after pregnancy; the same can increase the risk of gestational diabetes; pregnant women will also have insomnia, forgetfulness, irritability and other manifestations of plant nerve dysfunction. Pregnant women are immune suppressed during pregnancy, immunity is low, pregnant women are weaker, at this time vulnerable to many infectious diseases, need sufficient rest during pregnancy, too much late night has a hundred harm but no benefit. Therefore, women in pregnancy must pay attention to rest, not overworked, must always maintain a healthy state to conceive a new life!