If amniotic fluid is too low in the fifth month of pregnancy, if it is caused by the poor environment in which the pregnant woman lives, the fetus can usually be preserved through timely treatment. If it is caused by fetal malformation or placental hypoplasia, it is not easy to preserve the fetus, and in serious cases, it is not recommended to preserve the fetus. 1. Poor living environment of pregnant women: For example, pregnant women living in dry and lack of water environment for a long time may cause dehydration, which will easily cause low amniotic fluid. If it is only a small amount of reduction, usually will not affect the embryonic development, through timely supplementation, usually can be preserved. 2. Fetal malformation: for example, fetal renal agenesis, renal tubular dysplasia and so on. In this case, there is also a chance to preserve the fetus, but it is not easy to preserve the fetus, and if the malformation rate is relatively large, it is usually not recommended to preserve the fetus. 3. Placental hypoplasia: e.g. pre-eclampsia, fetal growth restriction, etc., can be preserved through timely treatment; however, failure to replenish the amniotic fluid in time will easily lead to intrauterine oxygen deprivation, resulting in asphyxiation of the embryo, and therefore, it is not easy to preserve the fetus. If the amniotic fluid is found to be too low, it is recommended to analyze the cause of the disease in time, and then target treatment, so as not to affect the development of the embryo.