Low amniotic fluid during pregnancy, medically known as oligohydramnios, is a condition that may require careful monitoring and timely medical attention. While reduced amniotic fluid does not always indicate a serious problem, it can sometimes be associated with maternal, placental, or fetal factors.
In this article, Dr. Mini Salunkhe, Director – Obstetrics and Gynaecology at Momstory, explains the possible causes, symptoms, diagnosis and management of low amniotic fluid during pregnancy.
What Is Low Amniotic Fluid or Oligohydramnios?
Amniotic fluid surrounds and protects the baby throughout pregnancy. When the amount of this fluid becomes lower than expected, the condition is called oligohydramnios.
The amount of amniotic fluid can vary during pregnancy, and reduced levels may occur for several different reasons. Therefore, regular antenatal visits and pregnancy scans are important for monitoring both the baby and the amniotic fluid levels.
What Causes Low Amniotic Fluid During Pregnancy?
There can be several reasons for reduced amniotic fluid, including:
1. Leakage of Amniotic Fluid
Sometimes, amniotic fluid may leak slowly and intermittently. This can be difficult to distinguish from normal vaginal discharge, which is why any suspected fluid leakage should be evaluated by an obstetrician.
2. Maternal Factors
Certain maternal conditions may contribute to reduced amniotic fluid. These can include:
- High blood pressure
- Dehydration
- Other maternal conditions affecting pregnancy
3. Placental Causes
Problems affecting placental blood flow or perfusion can reduce the amount of blood reaching the baby, which may subsequently contribute to reduced amniotic fluid.
4. Fetal Causes
Certain fetal conditions, particularly those involving the urinary tract or kidneys, may be associated with reduced amniotic fluid.
5. Pregnancy Beyond the Due Date
As pregnancy progresses beyond the expected due date, the amount of amniotic fluid may gradually decrease. This is another reason why pregnancies that go beyond the due date require appropriate monitoring.
What Are the Symptoms of Low Amniotic Fluid?
Oligohydramnios does not always cause noticeable symptoms. Some pregnant women may not realize that their amniotic fluid has decreased.
However, some possible warning signs include:
- Intermittent leakage of fluid
- A gradual reduction in fetal movements
- A sudden decrease in fetal movements
If you notice reduced fetal movements or suspect that you are leaking fluid, contact your obstetrician promptly.
How Is Low Amniotic Fluid Diagnosed?
The amount of amniotic fluid is usually assessed during an ultrasound scan.
The sonologist may assess:
- Amniotic Fluid Index (AFI): The fluid is measured across four quadrants of the uterus.
- Deepest Vertical Pocket (DVP): The deepest pocket of amniotic fluid is measured.
Sometimes, serial ultrasound scans are needed to monitor changes in the fluid level and assess the baby’s overall well-being.
What Should You Do If You Have Low Amniotic Fluid?
Management depends on the cause of reduced amniotic fluid and the stage of pregnancy.
Some important steps include:
Attend Regular Antenatal Checkups
Do not skip your routine antenatal visits. Regular monitoring can help your doctor identify changes in amniotic fluid, fetal growth and overall pregnancy well-being.
Stay Well Hydrated
Adequate hydration is important during pregnancy, particularly when dehydration may be contributing to reduced fluid levels.
Do Not Ignore Fluid Leakage
Amniotic fluid leakage can sometimes be mistaken for vaginal discharge or urine. If you notice unusual or continuous fluid leakage, consult your obstetrician rather than trying to identify the fluid yourself.
Monitor Fetal Movements
A noticeable reduction in your baby’s movements should not be ignored. Contact your healthcare provider promptly if fetal movements decrease.
Manage Underlying Conditions
Conditions such as high blood pressure, diabetes and fetal growth restriction may need appropriate management to reduce pregnancy-related risks.
Does Low Amniotic Fluid Always Mean There Is a Serious Problem?
Not necessarily. Reduced amniotic fluid may occur for different reasons, and its significance depends on the cause, severity and stage of pregnancy.
However, if oligohydramnios is associated with concerns involving the placenta, fetus, fetal growth or maternal health, closer monitoring may be required.
In pregnancies close to term, particularly when there is fluid leakage, fetal growth restriction or certain maternal conditions, the obstetrician may recommend delivery depending on the overall clinical situation.
When Should You Contact Your Obstetrician?
Seek medical advice promptly if you experience:
- Suspected leakage of amniotic fluid
- Reduced or suddenly decreased fetal movements
- Any concern about your baby’s well-being
- A known diagnosis of low amniotic fluid
Early assessment can help your doctor determine the cause and decide the appropriate monitoring or treatment.
Conclusion
Low amniotic fluid during pregnancy, or oligohydramnios, does not always indicate a serious problem, but it should be appropriately evaluated and monitored. Causes can range from dehydration and maternal conditions to placental or fetal factors and pregnancy progressing beyond the due date.
Regular antenatal checkups, ultrasound monitoring, adequate hydration and timely medical consultation are important for maintaining maternal and fetal well-being.
If you have concerns about reduced amniotic fluid, fluid leakage or decreased fetal movements, consult your obstetrician promptly.
For more information and pregnancy care, contact Momstory.
