The 25th week of pregnancy belongs to the middle stage of pregnancy, generally the height of the uterine fundus measured by hand at the end of the 24th week of pregnancy is one transverse finger above the umbilicus, and the length of the uterus on the ulnar side of the pubis is 22.0-25.1cm, and the 25th week of pregnancy is slightly higher than this. Gestational period is calculated from the first day of the last menstrual period, about 280 days (40 weeks), clinically divided into three periods, not up to 14 weeks is called early pregnancy, the 14th-27 ⁺ ⁶ weeks is called the middle gestation, the 28th week and beyond is called late pregnancy, 25 weeks of pregnancy belongs to the middle gestation. The height of the uterine fundus is usually measured by hand at the end of the 24th week as a horizontal finger above the umbilicus, and the length of the uterus on the ulnar side of the pubic symphysis is 22.0-25.1 cm, and it is slightly higher than that at 25 weeks of gestation. However, usually at 25 weeks of gestation, the fetus grows and develops rapidly in the uterine cavity, the length of the fetus is about 31cm, the biparietal diameter is about 6.5cm, the femur length is about 4.6cm, the amniotic fluid is more abundant, the fetus is usually more active in the uterine cavity, and the fetal movement is gradually obvious. Pregnant women need to take regular pregnancy checkups to keep an eye on the size of the fetus and its growth and development in the uterus.