There are several differences between women who have had children and those who have not: first, changes in the skin of the abdomen. More than 90% of women who have given birth will have stretch marks and it is difficult for all of them to fade away after giving birth, while the abdominal skin of women who have not given birth is firm, elastic and non-pigmented. Second, the breast changes. Whether breastfeeding or not, women who have given birth will have larger and darker breasts, enlarged areolas, and brown nipples due to hormonal changes in their bodies during pregnancy. If a breastfeeding woman’s breast will also appear loose, sagging, inelastic, while the breasts of women who have not had children are full, areola, nipple color pink. Third, changes in the cervix. Women who have not had children have an O-shaped cervical opening, while women who have had children have an -shaped cervical opening, which is the most important basis for clinicians to determine whether they have a history of childbirth.