Having more children may make the uterus larger, but not absolutely. After multiple pregnancies and deliveries, the uterine muscles contract through multiple diastole and women will have poor postpartum contractions making the uterus larger. The uterus of pregnant women with multiple pregnancies and deliveries will not get bigger because the fetus is moderately developed at the time of pregnancy, no huge baby is produced, proper postpartum maintenance, breastfeeding, and good uterine recovery, but the uterus will get bigger during pregnancy if the pregnant women do not test their blood sugar in time and overeat and produce a huge baby. The absence of breastfeeding or the occurrence of infection after delivery will affect the uterine regeneration, and the uterus will become larger after delivery, and the uterine cavity will also become larger, and multiple deliveries will not necessarily lead to an enlarged uterus.