If you think you may be pregnant, knowing which type of pregnancy test does what can help you make sense of your options and take the right next step. Both blood and urine tests are used to detect pregnancy, but they work differently and serve different purposes.
At You Medical, licensed medical staff provide pregnancy testing and other medical services in a clinic setting, all available at no cost.
What Both Tests Are Looking For
Both blood and urine pregnancy tests detect the same hormone: human chorionic gonadotropin, or hCG. This hormone, hCG level begins to rise almost immediately after the embryo implants into the wall of the uterus.
The key differences between the two tests come down to sensitivity, the earliest time they can detect hCG, and the amount of information they provide.
Urine Pregnancy Tests
Urine tests are the most commonly used method for detecting pregnancy. They work by detecting hCG in a urine sample and returning a simple positive or negative result. When taken correctly, typically after a missed period, urine tests are 99 percent accurate.
Testing too early is the most common reason for a false negative, as hCG levels may not yet be high enough to be detected. Taking the test with the first morning urine, when hCG concentration is at its highest, can improve accuracy.
At You Medical, lab-quality urine pregnancy tests are provided by licensed medical staff in a clinic setting, at no cost. Lab-quality tests are more sensitive than many over-the-counter options and are administered under proper medical guidance.
Blood Pregnancy Test
Blood pregnancy tests are performed in a medical setting and are capable of detecting hCG at much lower concentrations than urine tests. This means they can identify a pregnancy as early as 6 to 8 days after conception, often before a period has been missed.
There are two types of blood pregnancy tests. A qualitative blood test simply confirms whether hCG is present, as a urine test does. A quantitative blood test, sometimes called a beta hCG test, measures the exact amount of hCG in the bloodstream and provides a numerical result.
Quantitative blood tests are typically ordered in specific situations where more detailed information is needed, such as monitoring a pregnancy that may be at risk for miscarriage, evaluating a suspected ectopic pregnancy, or assessing a possible molar pregnancy. Because they require lab analysis, blood may need to be drawn on two different days to compare pregnancy hormone (hCG) levels.
Why an Ultrasound Is the Next Important Step
While both tests can indicate pregnancy, neither can verify important details about the pregnancy’s location, viability, or how far along you are. A limited diagnostic OB ultrasound can help verify your pregnancy and provide additional information.
An ultrasound can confirm that the pregnancy is located in the uterus and not ectopic (a pregnancy outside of the uterus, which can be life-threatening if not treated). It can also assess viability by detecting a heartbeat and measuring heart rate, and determine gestational age to estimate a due date. This information can be important when considering your next steps.
At You Medical, limited OB ultrasounds are available in a professional setting, at no cost, following a pregnancy test.
If you think you may be pregnant, schedule an appointment at You Medical to receive testing and medical services at no cost and take your next step with accurate information.
You Medical does not provide or refer for abortions.
