Whether to stay for 30 days or 42 days can be decided according to four factors: whether the discharge is clean or not, whether there is still discomfort or not, whether you have adapted to the current routine or not, and whether you have enough energy or not. 1. Whether or not the discharge is clean: usually the discharge will be completely clean within 6 weeks after delivery. However, each person’s physical condition is different, so the time for the discharge to clear up is also different. If the time for the discharge to clear up is more than 6 weeks, it is recommended to sit on the moon for 42 days, so as to give the body more time to recover. 2. Whether the body is still uncomfortable: poor physical condition or some cesarean section mothers, if the body is still uncomfortable after 30 days of menstruation, it is recommended to extend the period of menstruation to 42 days. 3. Whether the mother has adapted to the current work schedule: During the month, the mother has to get up several times at night to feed the baby, if she has not fully adapted to this work schedule, it is recommended to extend the period of the month to better adapt to it. 4. Whether the mother is full of energy: it takes some time to recover after giving birth to a child, during the period of the month, if the recovery is faster, the energy is very full, then the month can sit for 30 days. Therefore, according to the mother’s own state and recovery to choose the time to sit in the moonlight, and try to avoid a long time lying in bed, should be appropriate exercise, is conducive to the recovery of the body.