Pregnancy line refers to a vertical line passing through the navel in the middle of most women's stomachs after pregnancy, which is the product of hormonal changes during pregnancy. Each pregnant woman's pregnancy line varies in length and depth. The reason is that the pigment is deepened and aggravated due to the influence of hormones, which leads to the deposition of pigment in the bottom layer of skin.

In fact, this line existed before pregnancy and belongs to the normal physiological line. When you are not pregnant, most people are shallow and difficult to distinguish, so this line itself has no effect, but it affects the appearance a little.

Generally speaking, stretch marks are more obvious in people with more hair or pigment. Every expectant mother has a different time to produce pregnancy line, which generally appears in the middle and late pregnancy when the abdomen gradually bulges, and some expectant mothers are more obvious in the later period.

Stretch marks generally fade naturally within a few months to a year after delivery and gradually disappear. Some people disappear after 1-2 years, or fail to disappear completely, which varies from person to person.