The reason for the sudden decrease in amniotic fluid

During pregnancy, the fetus is always surrounded by amniotic fluid, and the material exchange between the fetus and the mother is carried out through the amniotic fluid. However, some pregnant women will find that the amniotic fluid is gradually decreasing during the late pregnancy examination. The decrease in amniotic fluid is largely due to abnormalities in the placenta. Whether it is fetal malformation or premature placental detachment, it is not good news for the fetus. Of course, apart from negative factors, multiple births can also cause the amount of amniotic fluid to decrease in the late pregnancy.

Twins or multiple births can cause oligohydramnios. If you are pregnant with twins or multiple births, it is possible that there will be oligohydramnios. Patients with twin-twin transfusion syndrome may have oligohydramnios, and it is possible that one of the fetuses has less amniotic fluid while the other has more.

It is also possible that the low amniotic fluid is caused by fetal malformation. If low amniotic fluid is detected in the early or mid-term pregnancy, it is most likely caused by fetal defects. If the fetus's kidneys are abnormally developed or there are no kidneys, or if the urethra is blocked, it cannot produce enough urine to maintain the amount of amniotic fluid. Congenital heart defects can also cause this situation.

Of course, when there is an abnormality in the placenta, it will also cause a low level of amniotic fluid. For example, if the placenta is partially abrupted, or the placenta cannot supply blood and nutrients to the fetus, it will cause the fetal amniotic fluid circulation to be interrupted, resulting in a low level of amniotic fluid. In addition, if the pregnant woman suffers from certain diseases, it will also cause a low level of amniotic fluid, such as lupus, gestational diabetes, or chronic hypertension. These diseases will all cause a low level of amniotic fluid.

There are many reasons for the decreasing amount of amniotic fluid during pregnancy. It may be caused by twins or multiple births, fetal malformations, placental abnormalities, or some disease in the pregnant woman. When the amount of amniotic fluid is low, the cause should be identified and targeted treatment should be given.