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How early can home pregnancy tests show positive results?

Ancient Egyptians relied on a form of urine testing to determine pregnancy status way back in 1350 BCE. A woman urinated daily on wheat or barley seeds and if the plants grew, it meant she was pregnant. Modern-day validation suggests that test was about 70% accurate in detecting human chorionic gonadotropin (hCG), a hormone produced by a woman’s body soon after implantation of a fertilized egg inside the uterus. Thankfully, urine-based pregnancy tests have evolved substantially. Women now have access to advanced tests that can detect a pregnancy as early as eight days after ovulation. But while many home pregnancy tests are marketed as simple and effective, getting accurate results comes down…

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 A graphic designer, a paper clip box and a toilet: How the home pregnancy test changed women's lives

A 1978 advert in Vogue called the first home pregnancy test a "private little revolution any woman can easily buy at her drugstore," — a revolution made possible by a 26-year-old graphic designer. Meg Crane's invention contributed to the feminist movement and let the women reclaim their privacy and their bodies.

 The best pregnancy tests? Science has some advice

Though at-home screens are all functionally the same, peer-reviewed research can separate the best pregnancy tests from ones better left at the dollar store. If you’ve ever tried to buy a pregnancy test, you’ve probably stared down the pharmacy aisle and noticed a dizzying amount of options. Unfortunately, there’s a good chance that if you think you might be pregnant, you’re already on-edge, and all the choices can go from confusing to overwhelming. You might wonder what differences there are between the tests, and if those features really matter. Should you get a manual or digital test? What about a pack of low-tech, paper strips? And most importantly, will the test you pick give you your answer accurately and quickly? While all tests work fundamentally the same way, a few key differences can help you hone in on what are actually the best pregnancy tests. Here’s what you should need to know.

Articles of Interest

All Your Questions About At-Home Pregnancy Tests, Answered

The higher the levels of hCG in the system (and thus, the urine), the more likely you are to get a plus sign on your pregnancy test — however, just because you get a negative result doesn't necessarily mean you aren't pregnant, it just may mean you took it too early. Dr. Cepin recommends that if you've been trying to get pregnant and you get a negative result, don't get too discouraged — simply wait a week and try again.

Are Digital Pregnancy Tests a Wasteful Scam? An Investigation

“You’re paying a higher price to take away the need to interpret the results because they’re just handed to you,” said Karen Duncan, an attending physician and director of the obstetrics and gynecology residency program at NYU. “It’s a fee for making the test more simple to interpret.” A Clearblue spokeswoman confirmed that the test strips inside their digital pregnancy tests use the same method of confirming pregnancy as test strips alone. She added that another benefit of the digital test is a countdown timer that lets a user know when results will be available, since test strips are optimized to be interpreted within a certain time window.

Could Women Be Trusted With Their Own Pregnancy Tests? By Pagan Kennedy

Today, eight out of 10 women learn they are pregnant from a drugstore device. The test allows women to quickly begin prenatal care or seek out an abortion. The home-testing wand has become a bit of everyday magic. And yet the test did not become available in the United States until 1977 — four years after Roe v. Wade, and 10 years after Ms. Crane proposed it. Pharmaceutical companies were afraid of antagonizing doctors and aligning themselves with the “fast women” who desired a fast test.

Egyptian Papyrus Reveals This Old Wives’ Tale Is Very Old Indeed

The “Wheat and Barley” pregnancy test described in a recently translated medical text has been practiced for thousands of years

Here’s the Woman Who Invented the Home Pregnancy Test

The New York Times Sunday Review has a stunner of a story about Margaret Crane, the original inventor of the home pregnancy test, as well as the frankly sexist attitudes she encountered after she proposed the idea to her bosses at Organon Pharmaceuticals.

Home pregnancy tests: Can you trust the results?

Many home pregnancy tests claim to be 99% accurate. But home pregnancy tests differ in their ability to find a pregnancy in people who have recently missed a period. If you get a negative test result, but you still think you might be pregnant, take another test one week after your missed period or contact your health care provider.

How to get the most accurate pregnancy test results

Understanding how pregnancy tests work and the best time to use them can help ensure the most accurate results. Waiting at least one week after the date of your missed period can provide the most accurate results.

Is My At-Home Pregnancy Test Accurate?

Home pregnancy tests are a quick and hassle-free way of testing whether you are pregnant or not. However, they might sometimes give false-positive or false-negative results as well.

Lia Is the Game-Changing Pregnancy Test You Can Flush Down the Toilet

Picture a pregnancy test, and chances are that some version of the following image will pop up: a clinical plastic stick, possibly with a pink handle and the words “pregnant” and “not pregnant” printed at one end. Now try and imagine a vastly new-and-improved version of the product that's become so integral to women’s lives, but hasn't changed in three decades. What would that even look like?

Old Pregnancy Tests? Turns Out, They're In Demand! (P.S. Do You Save Your Pregnancy Tests?)

Thirty five years ago, e.p.t. released the first at-home pregnancy test kit. Apparently the kit that debuted in 1977 (a year before I was born!), was far from the sleek little test strips we know and love today. (We've come a long way, baby!) In fact, it included test tubes and other medical supplies and required two hours to give a result. Can you imagine?! And, guess who is in search of these old-style pregnancy tests? The Smithsonian!

Prototype Device Lets Blind Women Take Pregnancy Tests in Privacy

A British charity has developed a prototype pregnancy test that displays results by raising tactile silicone bumps, rather than displaying text or lines on a screen. The Royal National Institute of Blind People, or RNIB, this week introduced the reimagined urine-stick test, which features an absorbent pad that is 50% larger than the average and a contrasting yellow-and-pink color scheme to help the user distinguish between the top and bottom of the device.

Strips of Hope: Accuracy of Home Pregnancy Tests and New Developments

The first home pregnancy test was introduced in 1976. Since then, pregnancy tests have become the most common diagnostic assay used at home. Pregnancy tests use antibodies to detect human chorionic gonadotropin (hCG). It is an ideal marker of pregnancy since it rises rapidly and consistently in early pregnancy and can be detected in urine.

The Best Pregnancy Test

A pregnancy test result should be clear and trustworthy. Choosing a reliable test upfront may save you the emotional turmoil of an uncertain result. Or, at the very least, it will save you some cash. We’ve assessed 37 different tests, scoured online reviews and manufacturers’ testing data, and talked with a clinical chemist, a fertility specialist, and an expert on the pregnancy hormone hCG. We’re confident that First Response Early Result is the home pregnancy test to take. Of course, the best test for you depends on your needs and your budget. We have recommendations for other traditional wand tests, digital wand tests (which display a “yes” or “pregnant,” or “no” or “not pregnant” result on a screen), bulk packs of test strips, and store-brand tests.

The Unknown Designer of the First Home Pregnancy Test Is Finally Getting Her Due

It was once a test conducted by doctors, requiring an appointment for an office visit. So in the mid-1970s, with the invention of the home pregnancy test, a woman’s path to finding out if she was going to have a baby made a revolutionary new course correction.

Thin blue lines: product placement and the drama of pregnancy testing in British cinema and television

This article uses the case of pregnancy testing in Britain to investigate the process whereby new and often controversial reproductive technologies are made visible and normalized in mainstream entertainment media. It shows how in the 1980s and 1990s the then nascent product placement industry was instrumental in embedding pregnancy testing in British cinema and television's dramatic productions. In this period, the pregnancy-test close-up became a conventional trope and the thin blue lines associated with Unilever's Clearblue rose to prominence in mainstream consumer culture.

This is What the First Home Pregnancy Test Looked Like

Today, many women take it for granted that they can determine whether or not they’re pregnant in the privacy of their own homes — often in the very early stages of pregnancy. But things weren’t always so simple. In the 1960s, the only way to test for pregnancy was to make a doctor’s appointment, give a urine sample, and wait up to two weeks for the results. The long wait didn’t just inspire nervousness: it inspired graphic designer Margaret Crane to invent “Predictor,” the first at-home pregnancy test.

What causes a false positive pregnancy test?

It's rare, but it does happen. No matter what, taking a pregnancy test can be an emotional roller coaster. When it comes to getting a false positive pregnancy test result, the experience can be deeply upsetting, particularly for anyone who has had a difficult time getting pregnant or is actively hoping to get pregnant (or both). The hope that comes with seeing that positive sign crashing down as you realise it was a false positive pregnancy test? It's a uniquely devastating emotion.

Resources

6 Things That Can Cause a False Positive Pregnancy Test About

Although false-positive pregnancy test results are rare, here are six of their most common causes.