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A few years ago pregnancy tests actually required you to be late for several days, a week, or even longer. Nowadays, the accuracy of early pregnancy tests have drastically changed with new methods. Today, early pregnancy tests can now provide accurate results as soon as the first day you miss your period or, in some cases, before you miss your period at all.
Levels of hCG
The way early pregnancy tests are conducted today is by determining hCG levels. hCG is a hormone that is produced when an embryo attaches to the wall of the uterus. Early pregnancy tests use the detection of this hormone to formulate a positive (or negative) result without the need to visit the doctor.
💡 Did You Know?
hCG levels double approximately every 2-3 days in early pregnancy, which is why testing later gives more reliable results. However, sensitive tests can detect lower levels of hCG much earlier.
Choosing the Best Early Pregnancy Test
When looking for an early pregnancy test, we think that the best choice is our own Midstream Pregnancy Tests – Extra Sensitive – this is because they are both highly sensitive and great value for money. While other tests use the same hCG detection method that Zoom Baby test uses, our is able to detect much lower levels of hCG. Most home kits are able to detect hCG levels that are between 25 and 100 mIU; Zoom Baby tests can detect levels as low as 10 mIU.
The longer the embryo is attached to the wall of the uterus, the more hCG is produced by the female body. As a result, being able to detect lower amounts of hCG will allow you to know sooner whether or not you are pregnant.
⭐ Brand Alternatives
If you are looking for a branded product, two good choices are the Clearblue Early Detection Pregnancy Test and the First Response Early Results Pregnancy Test. Both are great, value for money products that offer 99% accurate results when used correctly.
Best Early Pregnancy Tests – Reading The Results
hCG detection levels are important when choosing your home pregnancy test. However, there are a few other factors that you need to consider. If you aren’t able to figure out how to actually read your pregnancy test, it won’t matter how early you can take the test or how fast the results come in.
When taking your pregnancy test, most will be midstream type. Basically you will hold the test strip under your urine stream for a few seconds. The test strip will then detect the hCG levels within the urine and display the results within a few minutes.
On some home tests the results will be displayed with a plus sign (for pregnancy) or a minus sign (if not pregnant). Other tests will display nothing if you are not pregnant and a straight line if you are pregnant. Making sure you understand how the results are displayed is important.
In the end, finding a pregnancy test that works for you is the most important choice and the one you should stick with.
✓ Pro Tip
Use first morning urine for the most concentrated hCG levels and most accurate results, especially when testing early.
Accuracy & Reliability
It is essential to keep in mind that despite the progress made in early pregnancy tests, there is still a slight chance of receiving an inaccurate result, whether it be a false negative or positive. Various factors, such as testing too early or late, using out-of-date tests, or not strictly adhering to the given instructions can influence the accuracy of these results. It is strongly advised to verify the outcome with a healthcare professional if any doubts or concerns arise.
In addition to detecting pregnancy, certain early pregnancy tests offer additional capabilities like estimating the number of weeks since conception or displaying results digitally. These supplementary features can provide further information and assurance for women who are actively trying to conceive or are uncertain about their current pregnancy status.
In summary, significant progress has been achieved in terms of accuracy and convenience when it comes to early pregnancy tests. These tests now have the capability to identify even smaller amounts of hCG and produce results as soon as the initial day after a missed period. Such tests grant women the chance to discover their pregnancy status at an earlier stage. Nonetheless, it is crucial to select a trustworthy brand and thoroughly comprehend the instructions in order to obtain dependable outcomes. Whenever faced with uncertainty or confusion, seeking guidance from a healthcare professional remains the most advisable step to take.
Photo Credit: Zoom Baby
This post first appeared in 2019. It was last updated in November 2025.
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Related Resources
What is an Early Pregnancy Test?
Understanding the basics of early pregnancy testing
How Do Early Pregnancy Tests Work?
The science behind hCG detection
The Best Way to Take a Pregnancy Test
Step-by-step guide for accurate results
When Is the Best Time to Take a Pregnancy Test?
Timing your test for maximum sensitivity
Are Pregnancy Tests Always 100% Correct?
Factors affecting test accuracy



