How Long After Implantation Can I Test With First Response (And Why)?

Exact Answer: 48 hours to 5 days

Implantation is the step that follows the fertilization of the egg. When the egg is fertilized by the sperm, it forms a zygote. This cell cluster then travels through the fallopian tube to the uterus to attach itself to the uterine walls. The successful attachment of the zygote to the wall of the uterus is called implantation.

First Response, on the other hand, is one of the leading companies in the market that manufactures home pregnancy detection test kits. The brand has been known for its ability to detect pregnancy even before implantation has happened by successfully measuring the hCG levels in the woman’s urine sample.

How Long After Implantation Can I Test With First Response

How Long After Implantation Can I Test With First Response?

First Response has several different tests available in the market. All of them are geared towards providing women with accurate results as soon as possible in a convenient manner. However, there are certain parameters to be kept in mind when using these home pregnancy detection kits.

The First Response Early Result Test kit as well as the First Response Test & Confirm kit detect pregnancy with a staggering level of accuracy 5 days prior to a missed period. It is important to cognize that it takes about this long for the implantation to happen after the fertilized egg moves down from the fallopian tube to the uterus.

However, these tests do claim that they can detect pregnancy hormones in the women as soon as 48 hours after implantation has happened. Then, it would be possible to take the test almost 6 days before the expected period date. The results would presumably be accurate.

The First Response Rapid Result Pregnancy Test can detect pregnancy hormones on the day of the missed period. This test is also faster in displaying results. It may be more prudent for women to use this test as the earlier ones may sometimes be liable to display false positives or negatives.

Yet, First Response test kits are known to be one of the most accurate home pregnancy detection tests. Their reliability is mostly uncontested. However, if you suspect that it’s a false negative and show signs of pregnancy despite a negative test, a lab test should be the next option to confirm the hunch.


In summary:

Test UsedTime Period
First Response Early Result Test kit48 hours to 5 days after implantation
First Response Rapid Result Pregnancy TestDay of the missed period

Why Do I Have To Wait So Long After Implantation To Test With First Response?

The waiting period that’s stipulated on the First Response testing kits is important to follow because it is in congruence with the hormone levels of the woman’s body. To understand the time gap is important to understand how these kits work.

Most home pregnancy kits, including the First Response ones, work by calculating the hCG levels in the urine sample of a woman. After implantation, these levels increase to such an extent where they are identifiable by the home pregnancy tests. However, it is equally seminal to note that in some women the rise in this hormone may not be as steep initially as others.

This makes detection of pregnancy through home testing kits problematic. However, with First Response it is possible to detect pregnancy as early as 48 hours after implantation. The test kit boasts the fact that it uses a novel technology to detect even traces of hCG in the urine sample. The success rates of the kit also indicate the same.


However, in some women, it may still fail to show the correct results. Thus, the Rapid Result Pregnancy test can be used on the day of the missed period to detect the hormone. By then it has risen sufficiently to be detected on the kit.  

Nonetheless, it is always prudent to confirm a home pregnancy test with a proper blood test. Women who think they may be pregnant must visit a primary healthcare professional. This should be mandatory when the test comes back positive as prenatal care of the fetus has to be started.


Early detection of pregnancy can be helpful for the woman in question as it helps her decide about the future course of action. It is also helpful because prenatal care for the fetus can be started as soon as the pregnancy is confirmed. First Response home pregnancy kits help achieve both these objectives.

Generally, pregnancy tests can confirm conception only after the implantation has happened. This is related to the hormonal secretion that happens once the implantation is completed. First Response tests can be used to detect the hormone 48 hours after implantation. However, in some women, it may take up to 5 days after implantation to show accurate results.


One request?

I’ve put so much effort writing this blog post to provide value to you. It’ll be very helpful for me, if you consider sharing it on social media or with your friends/family. SHARING IS ♥️