If low amniotic fluid volume is found in the middle of pregnancy, the first thing to do is to rule out any developmental abnormalities of the fetus, especially whether the fetal urinary system has any abnormal development, which requires ultrasound examination. In addition, if necessary, amniocentesis should be performed for prenatal diagnosis depending on the age of the pregnant woman and whether she has high-risk factors. After ruling out developmental abnormalities and chromosomal factors that lead to low amniotic fluid, you can increase the amniotic fluid by drinking more water, eating a balanced diet and diversifying the diet on a regular basis, and compared to oral intake, inpatient rehydration is more effective for most pregnant women.