Pregnancy is usually visible around the fifth month of pregnancy, but there are individual variations. Manifestation refers to the appearance of pregnancy as the uterus increases in size. Generally in the fifth month of pregnancy, the bottom of the uterus reaches the umbilicus level, some thin pregnant women can show pregnancy, but there are individual differences, for fat pregnant women due to the thicker subcutaneous fat, so at this time there is no obvious abdominal bulging, may not show pregnancy. During pregnancy, it is necessary to take obstetrical examination on time, and listen to the fetal heart and measure the height of the uterine fundus, which can estimate the size of the fetus and the gestational week of pregnancy. The uterine fundus grows at different rates in different weeks of pregnancy, and is usually highest at 36 weeks. However, the height of the uterus is affected by the development of the fetus, the amount of amniotic fluid, and factors such as single and multiple births, and can also be combined with ultrasound examination to check the gestational week.