The 23rd week of pregnancy is generally not prone to hypoxia, but if the pregnant woman herself has hypoxic disease, it will easily cause fetal hypoxia. The 23rd week of pregnancy is the middle stage of pregnancy, when the fetus is just beginning to take shape. Generally speaking, hypoxia manifests itself in the late stage of pregnancy because the fetus increases in size in the late stage, and intrauterine activities of the fetus are restricted. If the pregnant woman herself has hypoxic diseases, such as gestational hypertension syndrome, anemia, asthma, diabetes, heart disease, kidney disease, etc., these conditions will lead to insufficient supply of oxygen to the umbilical cord, which will further lead to fetal hypoxia. Clinical advice 28 weeks pregnant with uncomfortable symptoms need timely consultation, without intervention is likely to cause fetal growth and development retardation or reduced fetal movement, or even cause fetal death, need to go to the hospital in time for examination, as soon as possible treatment.