Can Heat Ruin A Pregnancy Test?

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February 12, 2023 by Marjorie R. Rogers, MA (English), Certified Consultant

If a pregnancy test is exposed to heat, it can potentially ruin the test. The exposure to heat can cause the chemicals in the pregnancy test to break down, which can give you a false positive or negative result.

If you’re pregnant and taking a home pregnancy test, you might be wondering if heat can affect the results. The answer is yes, it can! Heat can actually ruin a pregnancy test by making the urine evaporate too quickly.

This can cause the test to give a false negative result, even if you are pregnant. So, if it’s hot outside or you’re taking your test in a warm bathroom, make sure to keep the test in a cool place (like the refrigerator) until you’re ready to take it.

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Leaving Pregnancy Test in Hot Car

If you’re like most people, you probably don’t think twice about leaving your pregnancy test in the hot car. But did you know that this could actually impact the accuracy of the test? Here’s what you need to know:

When a pregnancy test is exposed to high temperatures, it can break down the proteins in the urine sample and produce false positives. So if you leave your pregnancy test in a hot car, there’s a chance that it will give you an incorrect result. To avoid this problem, make sure to store your pregnancy test in a cool, dry place.

And if you’re taking a home pregnancy test, be sure to follow the instructions carefully to ensure accurate results.

Can Heat Ruin A Pregnancy Test?


What Can Disrupt a Pregnancy Test?

There are a few things that can disrupt a pregnancy test, making the results inaccurate. The most common is if the test is taken too early in the pregnancy. This can happen if you ovulate later than usual or if implantation occurs later than average.

Taking the test too early can also lead to a false-negative result, meaning you could be pregnant but the test says you’re not. Another thing that can disrupt a pregnancy test is taking it with medication that can affect hormone levels, such as certain birth control pills, antipsychotics, and seizure medications. If you think any of these factors might have interfered with your test, it’s best to wait a few days and retake the test or speak to your doctor about alternative options.

What Can Throw off a Positive Pregnancy Test?

Many things can affect the accuracy of a pregnancy test, including taking the test too early, having recently been pregnant, using fertility drugs containing hCG, or having a molar pregnancy. Taking a home pregnancy test can be an exciting experience. After all, you are potentially about to find out if you are going to become a parent.

However, it is important to understand that there are several factors that can influence the accuracy of these tests. If you take a home pregnancy test too early, it may give you a false-positive result. This means that the test says you are pregnant when you are not.

This can happen if you take the test before your body has had time to produce enough hCG (human chorionic gonadotropin), which is the hormone detected by pregnancy tests. It takes about two weeks for hCG levels to rise enough to be detected in a urine sample. So if you take a home pregnancy test immediately after missing your period and get a positive result, wait one week and then retest yourself to see if the result is still positive.

If it is negative, then it was most likely just an early false-positiveresult caused by taking the test too soon after implantation occurred. Another factor that could cause a false-positive reading on a home pregnancytest is recent exposure to hCG through fertility treatments such as injections or oral medication containing this hormone (often given to trigger ovulation). If this is something you have done recently and subsequently receivea positive home pregnancy test result, please contact your physician right away so they can confirm with another blood test whether or not you are actually pregnant since high levels of hCG from fertility treatments can also lead tofalse-positive results on some home pregnancy tests .

Additionally, having what is called “molar” pregnancies or hydatidiform molecan also cause falsely high readings of hCG on some home pregnancy testsand leadto inaccurate results . A molar pregnancy happens when abnormal tissue grows in place of an embryo and generally leads topregnancy loss . Molar pregnancies rarely turn into healthy pregnancies so itis importantto know if this might be affecting yourhCG levels before making any decisions about your current or future pregnancies .

What Happens If You Leave a Pregnancy Test in the Sun?

If you leave a pregnancy test in the sun, the heat can cause the test to change color. This may make it difficult to interpret the results. If you are unsure of the results, it is best to consult with a healthcare provider.

What Can Trigger False Pregnancy Test?

False pregnancy tests are not uncommon. In fact, it is estimated that false positives happen in up to 5% of all pregnancy tests. There are a number of things that can trigger a false positive result on a pregnancy test, including:

-Evaporation lines: These occur when the urine on the test strip evaporates and leaves behind a faint line. This can often be mistaken for a positive result. -Incorrectly reading the results: It can be easy to misread the results of a pregnancy test, especially if you’re anxious or excited about the possibility of being pregnant.

Always double check the instructions to be sure you’re interpreting the results correctly. -Chemical pregnancies: A chemical pregnancy is when a fertilized egg implants in the uterus but then spontaneously miscarries. This can cause levels of hCG (the hormone detected by pregnancy tests) to rise briefly before falling back down again, leading to a false positive result on a home pregnancy test.

If you think you might be pregnant, it’s always best to confirm with a visit to your doctor or midwife. They can perform an ultrasound to get a better idea of whether or not you are actually pregnant.


A pregnancy test can be affected by heat, but it is not likely to ruin the test. If the test is exposed to high temperatures, it may produce a false positive result.

About Author (Marjorie R. Rogers)

The inspiring mum of 6 who dedicates her time to supporting others. While battling with her own demons she continues to be the voice for others unable to speak out. Mental illness almost destroyed her, yet here she is fighting back and teaching you all the things she has learned along the way. Get Started To Read …