The 23rd week of pregnancy means that the pregnant woman is 5 months and 3 weeks pregnant, i.e. immediately entering the 6th month, which is the middle of pregnancy. The duration of pregnancy is counted from the first day of the last menstrual period, and every 4 weeks is a trimester, totaling 10 months, and the entire gestation period is 280 days. Therefore, the 23rd week of pregnancy is 5 months and 3 weeks, and the pregnant woman is about to enter the 6th month of pregnancy, at which point the ultrasound shows the same result as the 6th month. The body length of the fetus in the 23rd week of pregnancy is about 20 cm and the weight is about 450 g. The 18th to 24th week of pregnancy is the time of major fetal abnormalities, therefore, at the 23rd week of pregnancy, pregnant women are recommended to go to the relevant hospital for 3D or 4D ultrasound examination to rule out fetal abnormalities. In addition, pregnant women need to walk carefully in daily life and be alert to abnormal uterine contractions. Also, attention needs to be paid to weight control.