Women who stay up late may have an impact on their pregnancy. If a woman stays up late occasionally, it does not have much effect on her body, but if she stays up late often, it may affect the endocrine function and lead to endocrine imbalance, resulting in abnormal levels of hormones in the body, thus affecting the growth, development and discharge of follicles, causing poor follicular development or inability to ovulate. If women often stay up late, they are prone to abnormal digestive function, low immunity and abnormal nerve function, resulting in a variety of symptoms, which can also affect women’s reproductive function and lead to infertility. If a woman is planning to get pregnant, she should develop good sleeping habits, not stay up late and get enough sleep every day.