Amniotic fluid is the liquid present in the amniotic cavity and is one of the important substances that enable the fetus to survive. Amniotic fluid does not normally have a specific odor, slightly fishy. Amniotic fluid comes mainly from the mother’s dialysis fluid exchanged through the placenta, and partly from the surface of the placenta and umbilical cord, fetal skin exudation, and after the mid-pregnancy, fetal urine is the main source of amniotic fluid. Amniotic fluid is 98-99% water and the rest is organic matter and organic salts. Amniotic fluid in early pregnancy is clear and transparent, and normal amniotic fluid at full term is milky white with a slight viscosity because it contains fetal fat and shed cells from fetal skin. The amount of amniotic fluid at full term is 800-1000ml. Too much or too little amniotic fluid is considered abnormal and will affect the fetus, so you need to actively look for the cause and do something about it as soon as possible. Generally, amniotic fluid has a slightly fishy odor. When amniotic fluid smells bad, it indicates that the fetus or the mother is in danger. For example, in the case of intrauterine infections, the amniotic fluid may have a foul, smelly odor, which, if left untreated, can jeopardize the safety of the mother and child. The presence of amniotic fluid is a beneficial thing for both the mother and the fetus, it protects the fetus, it can provide a comfortable environment for the fetus, it can cushion the impact of the fetus on the mother during fetal movement, and it can ease the pain of contractions during labor.