HCG blood test - qualitative
A qualitative HCG blood test checks if there is a hormone called human chorionic gonadotropin in your blood. HCG is a hormone produced in the body during pregnancy.
Other HCG tests include:
How is the Test Performed?
Blood is typically drawn from a vein, usually from the inside of the elbow or the back of the hand. The site is first cleaned with germ-killing medicine (antiseptic). The health care provider wraps an elastic band around the upper arm to apply pressure to the area and make the vein swell with blood.
Next, the health care provider gently inserts a needle into the vein. The blood collects into an airtight vial or tube attached to the needle. The elastic band is removed from your arm.
Once the blood has been collected, the needle is removed. The puncture site is covered with an adhesive bandage to stop any bleeding.
Preparation for the Test
No special preparation is necessary.
How will the Test Feel?
When the needle is inserted to draw blood, some people feel moderate pain. Others feel only a prick or stinging. Afterward, there may be some throbbing.
Why is the Test Performed?
Most often, this test is performed to determine if you are pregnant or not. HCG level in the blood may also be high in women with certain types of ovarian tumors or in men with testicular tumors.
Normal Results for HCG blood test - qualitative
- The test is negative if you are not pregnant.
- The test is positive if you are pregnant.
What Abnormal Results Mean
If your blood HCG is positive and you do not have a pregnancy properly implanted in the uterus, it may indicate:
- Ectopic pregnancy
- Testicular cancer (in men)
- Trophoblastic tumor
- Hydatidiform mole
- Ovarian cancer
HCG blood test - qualitative Risks
There is very little risk in having your blood taken. Veins and arteries vary in size from one patient to another and from one side of the body to the other. Taking blood from some people may be more difficult than from others.
Other risks of having blood drawn are slight but may include:
- Excessive bleeding
- Fainting or feeling light-headed
- Blood accumulating under the skin (hematoma)
- Infection (a slight risk any time the skin is broken)
False positive tests may occur when certain hormones are increased, such as after menopause or when taking hormone supplements.
A pregnancy test is considered to be about 98% accurate. When the test is negative but pregnancy is still suspected, the test should be repeated in 1 week.
Lee P, Pincus MR, McPherson RA. Diagnosis and management of cancer using serologic tumor markers. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 22nd ed. Philadelphia, PA: Elsevier Saunders; 2011:chap 74.
Morrison LJ. General approach to the pregnant patient. In: Marx JA, Hockberger RS, Walls RM, et al, eds. Rosen's Emergency Medicine: Concepts and Clinical Practice. 7th ed. Philadelphia, PA: Elsevier Mosby ; 2009:chap 175.
Webster RA. Reproductive function and pregnancy. In: McPherson RA, Pincus MR, eds. Henry's Clinical Diagnosis and Management by Laboratory Methods. 22nd ed. Philadelphia, PA: Elsevier Saunders; 2011:chap 25.
|Review Date: 11/8/2012
Reviewed By: Susan Storck, MD, FACOG, Chief, Eastside Department of Obstetrics and Gynecology, Group Health Cooperative of Puget Sound, Bellevue, Washington; Clinical Teaching Faculty, Department of Obstetrics and Gynecology, University of Washington School of Medicine. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, David R. Eltz, Stephanie Slon, and Nissi Wang.
Learn more about HCG blood test - qualitative
Drugs associated with:
Micromedex® Care Notes:
- Choosing Between Vaginal Birth After C-section Or Repeat C-section
- Complete Hydatidiform Mole
- Ectopic Pregnancy
- Intimate Partner Abuse In Pregnancy
- Ovarian Cancer
- Ovarian Cancer, Ambulatory Care
- Pregnancy At 11 To 14 Weeks
- Pregnancy At 15 To 18 Weeks
- Pregnancy At 19 To 22 Weeks
- Pregnancy At 23 To 26 Weeks
- Pregnancy At 27 To 30 Weeks
- Pregnancy At 31 To 34 Weeks
- Pregnancy At 35 To 38 Weeks
- Pregnancy At 39 To 40 Weeks
- Pregnancy At 7 To 10 Weeks
- Spontaneous Miscarriage
- Testicular Cancer
- Testicular Cancer, Ambulatory Care