Pregnant belly to grow a line called pregnancy line, is the product of hormonal changes during pregnancy, is a physiological phenomenon. Most of the women after pregnancy in the middle of the stomach will appear a vertical line or across the navel, this line for the pregnancy line, is due to changes in the level of hormones in the body during pregnancy, to stimulate melanin deposits in the abdominal white line, the formation of longitudinal black stretch marks. Each pregnant woman’s stretch marks are different in length and depth. Some pregnant women will have deeper stretch marks, thickening, and even body hair, which may extend upward to the chest, while some pregnant women will have no change at all, which is normal. The appearance of stretch marks is not necessarily related to whether the fetus develops well in the uterus or whether it will grow stretch marks, and most of the stretch marks will naturally become lighter within one year after delivery until they disappear. The body will undergo some physiological changes after pregnancy, so there is no need to deal with them.