The first thing you need to do is to check the gestational week, if the gestational week is normal then you need to strengthen the nutrition, adjust the dietary structure, and review the ultrasound on a regular basis. 1. Check the gestational week: If you find that the fetus is on the small side, you can first check the pregnancy cycle. If there is no error in the week of pregnancy, it is necessary to consider other reasons. You need to rule out any causes of fetal growth retardation and deal with them in time to promote the growth of the fetus. 2. Enhance nutrition: The small size of the fetus at 26 weeks of pregnancy may be caused by insufficient nutritional supplementation. This time you need to improve the diet structure under the guidance of the doctor. Pay attention to nutritional balance in the diet, supplement some vitamins and minerals, ensure the daily intake of protein, and fresh vegetables and fruits to ensure the nutritional needs of the fetus. 3. Regularly review the ultrasound: the fetus is small, after a period of time to adjust the ultrasound review must be done, dynamic understanding of the development of the fetus clearly If you have a small fetus at 26 weeks of pregnancy, go to the hospital in time to find the cause, if it is caused by malnutrition, strengthen the nutrition can be.