After 32 weeks of pregnancy, the slow development of the baby’s biparietal diameter can be further systematic examination, active supplementation of a variety of nutrients, treatment of primary diseases, and continue to follow the monitoring, the specific need to follow the doctor’s instructions. After 32 weeks of pregnancy is the late pregnancy, if found that the baby’s biparietal diameter development is slow, need to carry out further fetal macroscopic structure screening and chromosomal screening, if it is due to chromosomal abnormality caused by fetal developmental delay, there is no good solution. If the chromosomal abnormality is normal, it is necessary to investigate the causes of thyroid dysfunction and iron deficiency anemia, which may also cause fetal growth retardation. After completing the above relevant examinations, for the possible causes of growth retardation, targeted treatment can be carried out under the guidance of the doctor, such as iron supplementation, regulation of thyroid function, and usually diversified and active diet to increase nutrition appropriately, in order to do a good job of follow-up monitoring.