Everything You Need to Know About Pregnancy Tests
- Medically Reviewed
- Last Updated
How do pregnancy tests work?
At-home pregnancy tests detect a hormone called human chorionic gonadotropin (hCG), which your body begins producing after a fertilized egg implants in the uterus. The amount of this hormone increases quickly in early pregnancy, and different tests are designed to detect it at varying levels.
Why do some tests work earlier than others?
Tests with higher sensitivity can detect lower levels of hCG, which may allow you to test a few days before a missed period. However, testing too early can sometimes lead to unclear or false-negative results, so timing still plays an important role no matter which brand you choose.
What is the best pregnancy test?
When looking at brands, a few stand out for their reliability and features.
First Response Early Result
Often considered one of the most sensitive tests available. Many people choose it when they want to test as early as possible, sometimes up to five days before a missed period. It uses simple lines to indicate results, and while reading lines can feel a bit uncertain at times, this test is widely trusted for early detection.
Clearblue
Another popular option, especially for those who prefer clarity. In addition to traditional line tests, Clearblue offers digital tests that display results in words like “Pregnant” or “Not Pregnant.” Some versions even estimate how far along you might be, which can feel helpful if you’re looking for more information right away. While digital tests tend to be slightly more expensive, many people appreciate the ease of reading the results.
Equate (Walmart), CVS Health, or Walgreens brand
Can be excellent choices if you are concerned about affordability. These tests often use similar technology to name brands but at a lower cost. When used correctly and at the right time, they are generally just as accurate. For many, this makes them a practical and reassuring option.
Pregmate or Easy@Home Test Strips
These are simple paper-strip tests that require dipping into a urine sample. They may not feel as high-tech, but they are widely used and reliable. These can be especially helpful if you want to test multiple times over several days without spending as much money.
Midstream VS Strip Tests
Midstream tests are designed to be held directly in the urine stream, which some find more convenient. Strip tests require a small collection cup but offer flexibility and affordability. Choosing between them often comes down to what feels easiest and most comfortable for you.
No matter which brand you choose, most tests are highly accurate—typically over 99%—when used correctly. If you receive a positive result, or even if you’re unsure about your result, following up with a healthcare provider can give you confirmation and help you understand your next steps.
Where can I get pregnancy tests?
Pregnancy tests are easy to find and widely available. You can purchase them at places like:
- CVS
- Walgreens
- Walmart
- Target
- grocery stores
- Amazon
- Online through other trusted websites
Privacy while shopping for a pregnancy test
If privacy is a concern, many stores offer self-checkout options, and online ordering can provide additional discretion. Some community clinics, like Ava Health, also offer free testing and a supportive environment if you’d prefer to talk with someone in person, who can keep your information private.
Frequently Asked Questions (FAQs)
Can I take a pregnancy test at any time and get accurate results?
Can I take a pregnancy test at any time and get accurate results?
No– Timing matters. Pregnancy tests are most accurate after a missed period. Testing too early may lead to a false-negative result because your body may not have produced enough hCG yet.
Does a faint line mean the test didn’t work?
Even a faint line can indicate pregnancy. It often means that hCG levels are still low but present. If you’re unsure, taking another test in a couple of days, or seeing a healthcare provider like Ava Health can provide more clarity.
Are digital tests more accurate than line tests?
Both digital and line tests are highly accurate when used correctly. The main difference is how results are displayed. Digital tests can feel easier to read, but they don’t necessarily detect pregnancy more accurately.
If I drink a lot of water, will it help get a better result?
Drinking too much liquid before testing can actually dilute your urine and make it harder to detect hCG. Testing with your first morning urine often provides the most accurate result.
If the test is negative, does that mean I’m definitely not pregnant?
A negative result isn’t always final, especially if taken early. If your period doesn’t come, it’s common to test again in a few days or speak with a healthcare provider.
Are all pregnancy tests basically the same?
While most tests are reliable, they do vary in sensitivity, cost, and ease of use. Some can detect pregnancy earlier; Others are more budget-friendly or easier to interpret.
Will medications or birth control affect the result?
Most medications, including birth control, do not affect pregnancy test results. However, certain fertility treatments containing hCG may impact accuracy.
Sources
American College of Obstetricians and Gynecologists. Pregnancy Tests. ACOG, https://www.acog.org/womens-health/faqs/pregnancy-tests.
Cleveland Clinic. Pregnancy Test: When To Take, Types & Accuracy. Cleveland Clinic, https://my.clevelandclinic.org/health/diagnostics/9703-pregnancy-tests.
Mayo Clinic Staff. Home Pregnancy Tests: Can You Trust the Results? Mayo Clinic, https://www.mayoclinic.org/tests-procedures/home-pregnancy-tests/in-depth/pregnancy-tests/art-20047940.
U.S. Food and Drug Administration. Home Use Tests: Pregnancy. FDA, https://www.fda.gov/medical-devices/home-use-tests/home-use-tests-pregnancy.
National Health Service (NHS). Doing a Pregnancy Test. NHS, https://www.nhs.uk/pregnancy/trying-for-a-baby/doing-a-pregnancy-test/.
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Disclaimer: The content on this site is for informational purposes only and does not constitute medical advice. Ava Health does not refer for or perform abortions. All medical information is accurate at the time of publishing.
Medically Reviewed By:
Anka Radutiu, BSN, RN
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