HCG Pregnancy Rapid Test

The hCG Pregnancy Rapid Test (Urine/Serum) is a rapid chromatographic immunoassay for the qualitative detection of human chorionic gonadotropin in urine to aid in the early detection of pregnancy.

Human chorionic gonadotropin (hCG) is a glycoprotein hormone produced by the developing placenta shortly after fertilization. In normal pregnancy, hCG can be detected in urine as early as 7 to 10 days after conception.hCG levels continue to rise very rapidly, frequently exceeding 100 mIU/mL by the first missed menstrual period and peaking in the 100,000-200,000 mIU/mL range about 10-12 weeks into pregnancy. The appearance of hCG in both the urine soon after conception, and its subsequent rapid rise in concentration during early gestational growth, make it an excellent marker for the early detection of pregnancy.

The hCG Pregnancy Rapid Test (Urine/Serum) is a rapid test that qualitatively detects the presence of hCG in urine or serum specimens at the sensitivity of 25 mIU/mL. The test utilizes a combination of monoclonal and polyclonal antibodies to selectively detect elevated levels of hCG in urine or serum. At the level of claimed sensitivity, the hCG Pregnancy Rapid Test (Urine/Serum) shows no crossreactivity interference from the structurally related glycoprotein hormones hFSH, hLH and hTSH at high physiological levels.

The hCG Pregnancy Rapid Test (Urine/Serum) is a rapid chromatographic immunoassay for the qualitative detection of human chorionic gonadotropin in urine or serum to aid in the early detection of pregnancy. The test uses two lines to indicate results. The test line utilizes a combination of antibodies including a monoclonal hCG antibody to selectively detect elevated levels of hCG. The control line is composed of goat polyclonal antibodies and colloidal gold particles. The assay is conducted by adding a urine or serum specimen to the specimen well of the Test Device and observing the formation of colored lines. The specimen migrates via capillary action along the membrane to react with the colored conjugate.Positive specimens react with the specific antibody-hCG-colored conjugate to form a colored line at the test line region of the membrane. Absence of this colored line suggests a negative result. To serve as a procedural control, a colored line will always appear in the control line region indicating that proper volume of specimen has been added and membrane wicking has occurred.

1. What is hCG and why is it important for pregnancy?

Human Chorionic Gonadotropin (hCG) is a sugar-protein hormone primarily produced by the syncytiotrophoblast cells of the placenta after a fertilized egg implants in the uteru. Its core function is to maintain pregnancy by signaling the corpus luteum (a temporary endocrine structure in the ovaries) to continue producing progesterone and estrogen. These hormones are crucial for stabilizing the uterine lining (endometrium), providing a supportive environment for the embryo to implant and develop.

2. How is hCG detected?

hCG can be detected through two main methods:

• Blood Test:This is the most sensitive and accurate method. A quantitative blood test can detect hCG as early as 7-10 days after conception. It measures the exact concentration of hCG in the blood, which is vital for monitoring the pregnancy's progress.
• Urine Test:​ This is the principle behind home pregnancy test strips. It is convenient but generally less sensitive than a blood test. It is most reliable around the time of a missed period or later, using first-morning urine when hCG concentration is highest.

3. What is the normal pattern of hCG levels during early pregnancy?

In a healthy early pregnancy, hCG levels show a characteristic pattern:

They become detectable shortly after implantation.Levels typically double approximately every 48 to 72 hours.The peak is usually reached around weeks 8 to 10 of pregnancy.After the peak, levels gradually decline and remain at a lower, stable level for the remainder of the pregnancy.

4. What can abnormal hCG levels indicate?

Deviations from the expected pattern can be a significant indicator for healthcare providers:

Slower-than-expected rise or a decline:​ This may suggest an early pregnancy loss (miscarriage) or an ectopic pregnancy​ (where the embryo implants outside the uterus, such as in a fallopian tube), which is a medical emergency.

Abnormally high levels:​ This could indicate a molar pregnancy​ (a non-viable pregnancy caused by an abnormal fertilized egg) or, rarely, a trophoblastic tumor. It can also be seen in multiple pregnancies (e.g., twins or triplets).

5. What should I know before getting an hCG test?

Fasting is not required:​ Unlike some blood tests, hCG levels are not affected by food intake, so you do not need to fast before the test.

Timing is key:​ Testing too early, especially with a urine test, can lead to a false negative result because the hCG level may not yet be high enough to detect.

Single vs. serial tests:​ A single test confirming pregnancy is useful, but the most valuable information often comes from serial quantitative blood tests​ performed 2-3 days apart to observe the doubling trend.

Consult a doctor:​ Always discuss your results with a healthcare professional. An hCG test is a powerful tool, but it is just one piece of the puzzle. Diagnosis always involves correlating the hCG levels with clinical symptoms and ultrasound findings.

POSITIVE:* Two distinct colored lines appear. One line should be in the control line region (C) and another line should be in the test line region (T).
*NOTE: The intensity of the color in the test line region (T) may vary depending on the concentration of hCG present in the specimen. Therefore, any shade of color in the test line region (T) should be considered positive.
NEGATIVE: One colored line appears in the control line region (C). No apparent colored line appears in the test line region (T).
INVALID: Control line fails to appear. Insufficient specimen volume or incorrect procedural techniques are the most likely reasons for control line failure. Review the procedure and repeat the test with a new test. If the problem persists, discontinue using the test kit immediately and contact your local distributor.

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