Amniotic Fluid Largest Pocket Measurement
An ultrasound test that measures the deepest vertical pocket of amniotic fluid around your baby to assess fetal well-being during pregnancy.
{"Measures amniotic fluid volume using ultrasound waves","Helps detect too much fluid (polyhydramnios) or too little fluid (oligohydramnios)","A routine part of prenatal care, especially in high-risk pregnancies","Non-invasive and painless procedure","Results help doctors monitor fetal health and decide on delivery timing"}
Key facts at a glance
- LOINC
- 11833-1
- Short code
- Fet AF space Diam.lgst pct mean US.meas
- Synonyms
- Fet AF space Diam.lgst pct mean US.meas
- Category
- cardiac
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- us-measured
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What is this test?
The Amniotic Fluid Largest Pocket Measurement is an ultrasound procedure that measures the deepest vertical pocket of fluid surrounding the baby in the womb. This test helps healthcare providers assess the amount of amniotic fluid, which is crucial for fetal development and health.
How is the test performed?
During this ultrasound exam, a technician or doctor will place a transducer (a small device) on your abdomen. Sound waves create images of your uterus and the amniotic fluid. The deepest pocket of fluid is measured in centimeters. The procedure is completely safe, painless, and takes about 15-30 minutes.
What do the results mean?
Results are typically reported as a single measurement in centimeters. Your doctor will interpret these results based on your pregnancy stage, overall health, and other test findings. Normal amniotic fluid levels are important for lung development, temperature regulation, and cushioning the fetus.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Abnormal amniotic fluid levels can indicate various conditions. Low fluid (oligohydramnios) may suggest kidney problems, placental issues, or preterm rupture of membranes. High fluid (polyhydramnios) may indicate gestational diabetes, multiple pregnancy, or fetal abnormalities. This test helps doctors monitor high-risk pregnancies and make decisions about early delivery or additional interventions.
Frequently asked questions
Is this test safe for my baby?
How should I prepare for this test?
What happens if my fluid levels are abnormal?
How often will I need this test?
Sources
- 1
- 2
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy