Low placental growth factor may be related to insufficient nutrition during pregnancy, maternal diseases and abnormal development of the fetus. 1. Insufficient nutrition during pregnancy: Pregnant women need to supplement a large amount of high-quality protein, vitamins and other nutrients during pregnancy, if the nutritional intake is insufficient, it may affect the normal development of the placenta, resulting in low placental growth factor. 2. Maternal disease: low placental growth factor can also be caused by maternal disease. For example, gynecological inflammation, pelvic inflammatory disease and damage to the endometrium, if they are not well controlled during pregnancy, they may lead to low placenta growth factor. 3. Abnormal development of the fetus: If the fetus is exposed to radiation for a long period of time during pregnancy or has bad habits, it may lead to abnormal development of the fetus, which may result in the low placenta growth factor. To summarize, there are many factors that lead to low placenta growth factor, so it is recommended that patients go to the hospital in time for a detailed examination to clarify the cause of the disease, so as to treat it.