Ever found an ancient pregnancy test in the back of a drawer and wondered, do pregnancy tests expire, anyway?

The first thing you can do is take a pregnancy test, which is an easy and effective method to find out if you are pregnant.

But they’re not infallible, and certainly won’t do you any good if the test is expired.

Read on to find out if pregnancy tests have an expiration date, what that means for their ability to predict a positive or negative early result in the first few months of gestation, and how you can rectify any mishaps when using an outdated product.

How Pregnancy Tests Work

To get started, we want to break down how pregnancy tests work before diving into what those expiration dates mean.

Pregnancy tests pick up a hormone called human chorionic gonadotropin (hCG) in the urine that is present when pregnancy occurs.

This hormone usually starts to increase around six to twelve days after conception.

Pregnancy Hormones (hCG)

Pregnancy tests specifically look for hCG in the body as it is a hormone only produced during pregnancy.

After fertilization, an egg implants into the endometrium and starts secreting hCG.

Especially during the first trimester of pregnancy, these levels are heightened.

The precision of a pregnancy test originates from its capacity to recognize lower rates (compared with 25 mIU/ml) of hCG in the urine.

Pregnancy tests take advantage of this hormone; they are designed to detect HCG in your urine, thus a simple and rapid way for you to verify whether or not you could be pregnant.

Different Types of Pregnancy Tests (Home vs Clinic)

The most commonly used home pregnancy tests (non-digital stick or dipstrip formats) detect hCG levels of 20, or in some cases, under.

Nevertheless, the clinical pregnancy test, based on a blood test, and these are also produced in health units and has a greater reliability.

At-home tests may offer convenience, but the quality of the test can fluctuate by brand.

In a clinical setting, pregnancy tests are sensitive to even lower levels of hCG than here and will be more reliable, especially if you think that it is very early in your pregnancy.

Do Pregnancy Tests Expire?

The answer is yes, pregnancy tests have expiration dates, and using an expired test may affect the results.

Home pregnancy tests are usually advised to be used within 2 to 3 years, but the time limit may vary based on the product, brand and storage.

Testing kits have less reliability when they have expired, so it is always advisable to check if the expiration date is near.

What Occurs When a home pregnancy test Goes Out of Date?

After a while, the chemicals in the test strip deteriorate so that subsequently, it might not identify hCG properly.

The antibody strip in the test that sticks to hCG may become damaged, so it no longer works.

When this occurs, the test might not show true results and could be a false negative or positive.

If the test has been stored in harsh temperature or high humidity conditions, that degradation is even accelerated.

Check Out the Expiry Date

Always check the expiration date to avoid using an old pregnancy test.

Usually, this information is printed on the outside of the test packaging box or wrapper.

Do not use a test that is expired, broken, or looks damaged in any way. An expired test just has too much potential to be an unreliable measure of infection.

Variables Impacting the Pregnancy Test Shelf Life

Pregnancy test expiration

The effectiveness of a pregnancy test expires for several reasons.

You can’t always control these things, and that is why it’s essential to know how to store the pregnancy test so as not to jeopardize its results in case something goes differently or a few weeks longer than you thought.

Storage Conditions

In the case of pregnancy tests, this is often humidity and temperature.

For example, a test stored in a humid bathroom cabinet will cause it to deteriorate faster.

The best way to store mushrooms is in a cool, dry place with good air circulation but not too much light. Should a test be subjected to hot or freezing conditions, the chemicals in that test may degrade more quickly and therefore deliver inaccurate results.

Packaging Integrity

The packaging integrity is crucial to maintain the test usability. After you have opened the package, it starts to age already, not after use.

Wrapped in sealed, not yet opened packages, the whole kit is used to protect the fragile test strip from environmental impact and keep it functional until its expiration date.

Quality and Brand Related Differences

Pregnancy tests aren’t all the same.

Meanwhile, higher quality tests may be more resilient or less dismored by storage conditions.

That often is the case because of better materials or next-gen tech that should, in theory, keep your investment running longer.

It is a good idea to pay for the name that has been tested and deemed fit, as this will enable you to access longer tests, which are more accurate.

Can you take a Pregnancy Test after it Expires?

Although you can technically use an expired pregnancy test in general, there are a few important things to keep in mind.

An outdated ABO test may generate a false positive or inconclusive result, which could lead to anxiety or misunderstanding.

Risks of an Outdated Test

By utilizing a test past its expiration date, you have multiple options to introduce hazards or compromise accurate results:

The biggest risk is that you could end up with a false negative when using an expired pregnancy test.

It happens when the test does not pick up any hCG in your system, and you are pregnant.

Having a false negative can cause someone to miss medical care or lifestyle changes in cases that need attention.

Sometimes, but only very rarely, you would get a false positive, which is just as much of an inconvenience because there’s a chance that if you think you are pregnant and you’re not, then in reality this can be distressing.

Recognizing when a test could have expired (without reading the date on it)

Occasionally, the date may not even be checked, and a pregnancy test will simply have been left out too long on the bathroom shelf to return accurate results.

If it is faded, if the lines are not full or complete, no control line (line that tells you the test worked right), you’re probably looking at an expired test.

The rule of thumb is that using a clean test will help in the long run.

Are Expired Pregnancy Tests Accurate?

Pregnancy tests do expire, and they can be less reliable the longer you keep them around.

Because, like we said before, the chemicals break down inside the test, which of course makes it harder for a pregnancy test to recognize hCG properly.

False Negatives and False Positives

A false negative is the most common problem with expired tests.

The test will show a negative result even if you are pregnant, because there is no longer hCG for the test to detect.

If this is your case might be why you are experiencing a delay in confirmation of pregnancy.

If there is a false positive result, it should always be rechecked in qualified labs as time after expiration can cause test strips to malfunction.

The Science Behind Accuracy Decline

The primary cause of a decrease in a pregnancy test’s accuracy is the degradation of the antibodies used to detect hCG.

The antibodies are extremely sensitive, and chemicals, like most materials, decay over time.

The test will no longer display accurate results once the chemicals are no longer operating correctly.

What to Do If You’ve Used An Expired Pregnancy Test

Now that you’re aware, you’ve used an outdated pregnancy test for sure.

This is what you need to do.

• Retaking the Test with a New Kit

If you suspect that you’ve used an expired pregnancy test, you should prepare to retake the test with a fresh, non-expired kit.

Prior to using your new test, check that it doesn’t expire by testing the expiration date on the package.

• Seeing a Doctor for Verification

If you are still in doubt or have conflicting results, go to your doctor: a clinical pregnancy test, either through a blood test or a urine test, will give you a more accurate reading.

How to Store Pregnancy Tests to Maintain the Shelf Life

Storing your pregnancy test properly can help you stay accurate for when you need to take a test.

Being vigilant about where and how you store your tests can have a huge impact on how effective they are when you use them.

Best Practices for Storage

You can expect your pregnancy test to last its entire shelf life if you keep it in a cool, dry spot.

Moist areas, like a bathroom can cause the test to degrade more quickly.

Ideally, keep the test in its original package until you’re ready to use it.

How is This Issue Prevented?

Avoid Extreme Temperatures

The biggest effect on a pregnancy test is extreme heat or cold.

Don’t leave tests in areas subject to temperature swings (e.g., the car or windowsill).

Stash them in a cool, dark spot—room temperature—and keep them away from strong sunlight or radiators.

Related: Understanding Your Pregnancy Test Result

FAQs

• Do Digital Pregnancy Tests Expire Differently?

Yes, digital pregnancy tests expire as well, but with a shorter shelf life than traditional strip tests because of their embedded battery. Even if Overdorp’s liquid battery works well up to the expiry date, it likely won’t work at all once that has passed.

• Can Out-Of-Date Tests Be Dangerous?

There are no health issues related to using an expired pregnancy test, unless it gives you an inaccurate result, which can cause emotional distress. Expired tests should be avoided in order to limit confusion.

• How Long After Expiry Is a Test Regarded as Unreliable?

The level of confidence in a test drops off significantly after it has expired, as time from creation becomes larger than the lived complexity cost. Some expired tests may still work a few months after expiration, but you are better off not counting on it. Use a test that is not expired for the best results.

• How Do I Tell if a Pregnancy Test is Out of Date?

Look at the expiry date on its packaging or an individual test wrapper. If you hold a pregnancy test and it appears discolored, has faded, or has no lines, then it is most likely out of date.

• Does Extreme Temperature Affect a Pregnancy Test?

Well, placing a pregnancy test in very hot or cold temperatures could degrade the chemicals inside and prevent an accurate result. The test should be stored at room temperature in a dry place.

• Mistakenly Using an Expired Pregnancy Test.

If you find out the test expired after already being used, you may as well take another (by buying a brand new kit that hasn’t yet and won’t have an expiry date). If answers are inconclusive or you still don’t know, ask your medical professional for a diagnosis.

In the end, using an expired pregnancy test is not worth the misunderstandings that may ensue.

It is true that pregnancy tests, marketed to promise peace of mind, are only trustworthy for as long as the box says they should be.

Even that could prevent a lot of stress, damage, etc., just always check the expiry date beforehand if you have to use credible methods for a pregnancy test or anything else done.

If you have used an expired test and are not sure about the result, it is advisable to do a new one or speak with your doctor to clarify.