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Human Chorionic Gonadotropin (hCG) in Serum or Plasma

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

This test measures the amount of human chorionic gonadotropin (hCG), a hormone produced after pregnancy begins. It helps track early pregnancy or detect conditions like ectopic pregnancy or molar pregnancy.

Quick summary

["hCG is critical for early pregnancy monitoring and certain medical conditions."]

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

Key facts at a glance

LOINC
20465-1
Short code
HCG MoM SerPl
Synonyms
HCG MoM SerPl
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
0
Ref high
5
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
84702
SNOMED
275917004
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

Why Is This Test Done?

Your healthcare provider may order an hCG test to confirm pregnancy, especially if you have missed periods or symptoms like nausea or breast tenderness. It can also be used to monitor high-risk pregnancies or check for conditions like gestational trophoblastic disease.

When Might You Need This Test?

You might need an hCG test during early pregnancy screening, after a miscarriage or ectopic pregnancy diagnosis, or if you’re experiencing unusual symptoms like severe nausea, bleeding, or abdominal pain.

What to Expect Before the Test

No special preparation is needed, but you may be asked to fast for 8–12 hours before the test if it involves drawing blood. Bring any medications or a list of current medications to your appointment.

What Happens During the Test?

A healthcare provider will collect a blood sample from a vein in your arm. You may feel a slight pinch, but it usually doesn’t cause discomfort. The sample is then sent to a lab for analysis.

Reference range

Non-pregnant: <5 mIU/mLN/A

Specimen: serum

No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

hCG Level

Frequently asked questions

What Are My Results Meant to Tell Me?
Your results will be reviewed by a healthcare provider, who will consider your medical history, symptoms, and other test results. They’ll explain what the numbers mean for your specific situation.
Can I Get Pregnant If My hCG Test Is Negative?
A negative hCG test means you’re unlikely to be pregnant, but it doesn’t rule out pregnancy 100%. If you’re trying to conceive or have missed periods, follow up with your provider for further testing or evaluation.
How Often Should I Get an hCG Test During Early Pregnancy?
If your provider orders hCG tests, they’ll determine the frequency based on your pregnancy status and risk factors. Regular monitoring may be needed for high-risk pregnancies or suspected complications.
  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