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Cervical fluid pregnancy test (qualitative hCG)

Published: August 9, 2026Updated: August 16, 2026

This test checks for the presence of human chorionic gonadotropin (hCG), a hormone produced during early pregnancy, using fluid collected from the cervix.

Quick summary

["A positive result suggests possible pregnancy; further evaluation may be needed."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
64999-6
Short code
RF Guided FR-R Cath place--transcervical
Synonyms
RF Guided FR-R Cath place--transcervical
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
rf
CPT
86430
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 Human Chorionic Gonadotropin (hCG)?

hCG is a hormone primarily produced after implantation of a fertilized egg in the uterus. It signals the body that pregnancy is occurring and is detected in early pregnancy. This test measures hCG levels in cervical fluid, which may be collected during a transvaginal ultrasound or other cervical sampling procedure.

Why Is This Test Performed?

This test is often used to confirm early pregnancy when other methods (like urine tests) may not be reliable, or to assess pregnancy viability in cases of suspected ectopic pregnancy or other complications.

How Is the Sample Collected?

A healthcare provider will collect cervical fluid using a sterile procedure, often during a transvaginal ultrasound or by gentle aspiration. The fluid is then analyzed for hCG levels.

What Are the Possible Results?

A positive result indicates the presence of hCG, which may mean pregnancy is occurring. A negative result suggests no detectable hCG, which may mean no pregnancy or an early miscarriage. Results should be interpreted by a healthcare provider in the context of clinical findings.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

hCG (human chorionic gonadotropin) screening in cervical fluid

Frequently asked questions

How soon after conception can this test detect pregnancy?
hCG levels typically begin rising after implantation, usually around 6–10 days after ovulation. However, cervical fluid hCG testing may not be as sensitive as blood or urine tests and may require confirmation with additional testing if needed.
Can this test detect an ectopic pregnancy?
Yes, this test can help identify early signs of pregnancy, including ectopic pregnancies, where the fertilized egg implants outside the uterus. However, further imaging (such as ultrasound) is often required for a definitive diagnosis.
What if my test result is negative but I suspect I’m pregnant?
A negative result may mean the test was not sensitive enough, or the pregnancy may be too early. Follow-up testing or additional clinical evaluation may be recommended by your healthcare provider.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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