The rate of growth of belly circumference varies from one pregnant woman to another, so it is usually recommended to start applying stretch mark oil in the middle of pregnancy, that is, around 4 months. Generally, after the middle of pregnancy, the fetus gradually increases in size and the pregnant woman’s belly also gradually increases in size, which makes the fibrous tissue of the skin susceptible to stretch marks. Therefore, when stretch marks are not formed, you should apply stretch mark oil preventively to nourish your skin, prevent stretch marks from forming and stop itching. You can also start using stretch mark oil if you feel that your belly is growing faster in early pregnancy or if you feel dry and itchy skin. Each time after cleaning the skin to pay attention to the belly, armpits, buttocks, thighs and other parts, these parts are prone to stretch marks, must be carefully applied, well coated and also appropriate massage to promote the effective ingredients as soon as possible by the skin absorption, so as to improve the health care effect. In addition, the growth of stretch marks varies from person to person, and it is closely related to their own physical condition and prenatal maintenance. Some women apply stretch mark oil or moisturizer from before pregnancy, which can improve the skin’s ability to expand and provide a maintenance effect. It is important to have regular pregnancy tests to observe whether the size of the fetus is normal. At the same time, pregnant women should strictly control their diet to ensure a balanced intake of meat, eggs, milk, vegetables, fruits and other nutrients to avoid a sudden surge in fetal weight.