The size of a pregnant woman’s belly at 26 weeks of pregnancy varies from individual to individual and from fetus to fetus, and cannot be generalized. The average abdominal circumference is usually around 21.62cm. Generally speaking, at 26 weeks of pregnancy, the average biparietal diameter of the fetus is about 6.68cm, the average abdominal circumference is about 21.62cm, the length of the femur is about 4.87cm, the weight is about 910g, and the body length is about 23cm. However, the size of the pregnant woman’s belly varies according to the different individuals and the development of the fetus, and it is not possible to make a generalization. The 26th week of pregnancy belongs to the middle stage of pregnancy, you need to observe the changes of fetal movement, ensure sufficient sleep and balanced nutrition. Because at 26 weeks, pregnant women can obviously feel frequent fetal movements. At the same time, due to hormonal changes in the body, as well as the increased weight of the uterus and amniotic fluid, it will cause pregnant women to sleep poorly, so it is necessary to make timely adjustments, maintain a good sleep and nutrition, regular physical examination, and if there is any discomfort, it should be promptly sought medical attention.