The normal size of a 7-month pregnant belly is between 23 and 30.5cm for uterine height and around 80 to 91cm for abdominal circumference. Uterine height and abdominal circumference are the main indicators of the size of a pregnant woman’s belly. As the fetus grows and develops in the uterine cavity, the size of the uterine height and abdominal circumference varies from week to week of pregnancy. The values of uterine height and abdominal circumference may also fluctuate due to individual differences in pregnant women such as height, weight and thinness. The size of pregnancy is usually expressed in terms of weeks of pregnancy, and the seventh month of pregnancy is between 28 and 32 weeks of pregnancy. Generally, the length between the upper edge of the pubic symphysis and the bottom of the uterus, or uterine height, is usually between 23 and 30.5cm, and the abdominal circumference is usually between 80 and 91cm in pregnant women during this period. During the pregnancy checkup, the doctor will combine the uterine height and abdominal circumference to make a preliminary judgment on the growth and development of the fetus in the uterus. Pregnant women must strictly follow the regulations and have regular pregnancy checkups to ensure the normal development of the fetus.