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Human Chorionic Gonadotropin (HCG) Mass Concentration

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

This test measures the amount of human chorionic gonadotropin (HCG), a hormone produced during pregnancy, in your blood or urine. It helps confirm pregnancy or monitor certain medical conditions.

Quick summary

["HCG levels can signal pregnancy or other health concerns—your doctor will interpret results based on your symptoms and medical history."]

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

Key facts at a glance

LOINC
2103-0
Short code
Choriomammotropin Amn-mCnc
Synonyms
Choriomammotropin Amn-mCnc
Category
chemistry
Sample
fluid
Container
Sterile tube
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
2-5 mL
Stability
Room temperature: 2h, Refrigerated: 24h
Hemolysis max
300
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Doctors order HCG tests to confirm pregnancy, especially in early stages when other symptoms may not yet appear. It’s also used to monitor conditions like ectopic pregnancies, molar pregnancies, or certain cancers (e.g., testicular or ovarian tumors).

How Is the Sample Collected?

A blood sample is typically taken from a vein in your arm. For urine tests, you may provide a first-morning urine sample. The lab processes the sample to measure HCG levels accurately.

What Are Common Results?

Results vary widely depending on the stage of pregnancy or condition being monitored. High levels may indicate pregnancy, while very low or abnormal levels could signal issues like miscarriage, ectopic pregnancy, or non-pregnancy-related conditions.

What Does a High HCG Level Mean?

A high HCG level often confirms pregnancy, especially if detected early. In non-pregnant individuals, elevated levels may suggest conditions like gestational trophoblastic disease or certain cancers.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

HCG levels rise gradually during early pregnancy, typically doubling every 48–72 hours. Abnormal patterns (e.g., slow rise or irregular spikes) may require further medical evaluation to rule out complications like molar pregnancy or ectopic pregnancy.

Short name

HCG Level

Frequently asked questions

Why might my doctor order an HCG test if I’m not pregnant?
Your doctor may recommend an HCG test to investigate symptoms like unusual vaginal bleeding, pelvic pain, or suspected cancer. It can also help diagnose conditions like ovarian cysts or other reproductive health concerns.
What happens if my HCG level is too low?
Low HCG levels may indicate early pregnancy loss, an ectopic pregnancy, or a non-pregnant state. Your doctor will discuss next steps based on your symptoms, medical history, and additional test results.
Can HCG levels be affected by medications?
Some fertility treatments or medications (e.g., certain hormones) may influence HCG levels. Always inform your healthcare provider about all medications or supplements you’re taking before testing.
  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