It is recommended to stay in the womb for 42 days. In clinical practice, menstruation usually refers to the period of puerperium, which is the period from the delivery of the placenta to the restoration of all the organs of the mother’s body, except the mammary glands, to their normal non-pregnant state, and usually lasts for 6 weeks, i.e., 42 days. During the puerperium, the mother should eat a reasonable diet, keep her body clean, her room should be clean and ventilated, her clothes should be wide and breathable, and she should pay attention to rest. Appropriate activities should be carried out as early as possible after delivery, which is conducive to the recovery of physical strength, urination and defecation, avoiding or reducing the occurrence of embolic diseases, and restoring the pelvic floor and abdominal muscle tone. The amount of exercise for postpartum rehabilitation should be gradual. Mothers should go to the hospital for routine checkups on the 42nd day after delivery, including general checkups and gynecological checkups. The former is mainly to measure blood pressure, pulse, check blood and urine routine, understand the situation of breastfeeding, if there are medical and surgical comorbidities or obstetric complications, etc. should be examined accordingly; the latter is mainly to observe the pelvic genitals whether it has been restored to non-pregnant state. If there is any abnormality, it should be dealt with promptly.