Fetal White Blood Cell Morphology (from Whole Blood)
This test examines the shape and characteristics of white blood cells in a sample taken from your baby during pregnancy. It helps assess fetal blood health and identify potential abnormalities.
["Understanding fetal blood cell structure can support early detection of conditions that may affect your baby’s development."]
Key facts at a glance
- LOINC
- 61179-8
- Short code
- WBC morph Bld Fetus
- Synonyms
- WBC morph Bld Fetus
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Ref low
- 4.5
- Ref high
- 11
- Critical range
- 2 N/A – 30 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 85004
- SNOMED
- 900000000000003002
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Done
Doctors may order this test if there are concerns about fetal health, such as suspected anemia, infections, or genetic conditions. It can also be part of routine monitoring in certain high-risk pregnancies.
How the Test Works
A small blood sample is taken from your baby, usually through a procedure called cordocentesis or sometimes from a fetal blood sample drawn during a procedure like amniocentesis. The cells are then examined under a microscope to identify their shape and count.
What to Expect Before the Test
You may receive instructions to prepare for the procedure, such as fasting or avoiding certain medications. Your provider will explain the risks and benefits, including the need for sedation or anesthesia.
What to Expect During the Test
The procedure is typically done in a hospital setting under sterile conditions. You may feel mild discomfort, but pain is usually managed with sedation. The test itself involves drawing blood from the umbilical cord or fetal vein.
Reference range
Adult: 4.5-11.0 x 10^9/LN/A
No special preparation required. Stay well hydrated.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Fetal WBC Morphology
Frequently asked questions
What does a fetal white blood cell morphology test measure?
How is the fetal blood sample collected for this test?
Can this test be done without an invasive procedure?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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