The amniotic fluid level is the maximum depth of amniotic fluid and is an important indicator to assess whether the amount of amniotic fluid is normal during pregnancy. Amniotic fluid is an accessory structure of pregnancy that is essential for the normal development of the fetus in the uterine cavity after pregnancy. Too little amniotic fluid can lead to lack of oxygen in the uterine cavity, while too much amniotic fluid can lead to abnormal fetal position and premature rupture of membranes. If the amniotic fluid level is between 3 and 8 cm, it is normal. If it is more than 8.0 cm, it is a sign of excessive amniotic fluid; if it is less than 3.0 cm, it is a sign of too little amniotic fluid. If excessive amniotic fluid or too little amniotic fluid is found during pregnancy checkup, further examination is needed to clarify the specific cause of the abnormal amniotic fluid volume before targeted treatment.