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17 Facts Answered About Pregnancy Tests & hCG Tests

17 Facts Answered about Pregnancy Tests and hCG Tests

HCG pregnancy tests are easy to use, but many common questions among Fertility2Family users in Australia and worldwide. So today, we are sharing answers to all of those questions on how to get the most accurate results from your pregnancy tests.

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When does your body start producing hCG?

A pregnancy test’s primary function is to detect the presence of the human chorionic gonadotropin hCG hormone found in your body. HCG is produced when the embryo attaches itself to the uterine wall, which happens after fertilization between days 6 and 12.

Early Detection Pregnancy tests detect the presence of hCG in urine between 5 to 7 days from your expected menstrual cycle, while non-sensitive tests can detect it and indicate pregnancy the first day after a missed period.

What pregnancy tests detect the lowest amount of hCG?

An hCG blood test can indicate a positive result earlier than the most sensitive urine tests. Home pregnancy tests that work by detecting the presence of hCG in collecting urine also have varying sensitivities.

On the test package, you will notice that it is written 10, 20, or 25 mIU/ml. A smaller number indicates that the test has a higher sensitivity. The Fertility2Family Home pregnancy tests are among the most sensitive available on the Australian market, with an hCG level of 10mIU/ml.

Which hCG test can determine the most accurate gestational age?

Blood test results indicate the levels of hCG. Doctors normally use medical tables to interpret the results. The tables show the correlation between hCG values and the specific time in pregnancy.

hCG level doubles after 2 to 3 days during the first weeks of pregnancy and peaks around weeks 9 to 10. At-home urine tests only detect the presence of hCG and not the amount. Therefore, it means that you cannot tell a baby’s gestational age using the tests.

Midstream pregnancy test VS Dip & Read Test

In Australia, the main two types of home pregnancy tests you will find online or in your local chemist are the strip tests and the instream pregnancy tests. With both types of tests, it is crucial to check and follow the instructions provided by the manufacturer to increase your chances of getting an accurate test result.

With the hCG strip tests, you will need to collect a urine sample in a dry clean cup, dip the test into the urine to the max level and hold the test in the sample for the amount of time the instructions show.

However, with the midstream tests, these tests are the larger of the two types and are designed to be used on the go and allow you to test for hCG levels wherever you are with ease. The instream tests are larger and more costly but are more convenient and do not require a collection cup, but instead placing the stick into your urine and collecting a sample this way.

Which pregnancy test is most accurate?

All available pregnancy tests in Australia have been approved by the TGA and tested for accuracy and quality. Fertility2Family and all other brands available have an accuracy level of 99%. In 2014 and 2015, studies were conducted and found the most common reason for an invalid test is user error due to taking the test two early or not collecting enough of a urine sample.


What Does an Evaporation Line on a Pregnancy Test Mean?

Also referred to as evap lines, it can occur in all home tests. Evaporation lines on a pregnancy test are colourless streaks, not a faint positive line. Evap lines typically happen when reading the test past the suggested reading time.

Can HPTs detect a chemical pregnancy?

Chemical pregnancies are very common, and based on current evidence, this type of early pregnancy loss where the fertilized eggs that fail to implant along successfully may account for up to 70 -75% of all conceptions. Due to the high sensitivity of Fertility2Family Pregnancy strips (10mIU), it is possible to detect a pregnancy that may be non-viable if testing before the first day of the missed period (often referred to as a chemical pregnancy)

What time of the day is best for taking a home pregnancy test?

First-morning urine that accumulates overnight in the bladder (after more than four hours of sleeping continuously) contains the highest amount of hCG hormone.

Most health care providers recommend that women take a pregnancy test in the morning. Excessive drinking of fluids usually causes the urine to be extremely diluted and can make the line faint or give you a false-negative result.

Is a pregnancy test positive if the second line is faint?

An insufficient hCG level in the urine may cause a faint line to appear on the test. It can also happen if you don’t follow the instructions.

In most cases, a faint second line on a home test is a sign of pregnancy if the test has been done correctly. Confirm your results by doing the following:

  • Take another at-home test in a 2 + days
  • Request for an hCG blood test after your expected missed period 
  • Take a more sensitive pregnancy test

What are the general recommendations to follow when taking a home pregnancy test?

To eliminate false-positive and false-negative results from a home test, you can do certain things. They include:

  • Following the instructions
  • Storing the package at the right temperature
  • Interpreting your results after the correct amount of time.

Also, you should not use test kits that have already expired.

Is it possible to reuse a pregnancy test? Why or why not?
Causes of a False Positive Pregnancy Test 

Can a home pregnancy test be a false-positive?

False-positive tests are extremely rare on all types of home pregnancy tests, but there are various reasons why a home pregnancy test can give you a false-positive result, including:

  • Hormone-dependent illness
  • The pregnancy test was not stored properly
  • Chemical pregnancy
  • Have recently experienced premature birth, a miscarriage, or an abortion
  • Not correctly following the Pregnancy test instructions
  • Interpreted the results later than the recommended time
  • Taking medication containing hCG

If you take a test and are unsure about the results, consider doing another test after a few days.

Can a home pregnancy test be false-negative?

A false negative home pregnancy test may happen due to the following factors:

  • Your urine was too diluted
  • The test kit is expired
  • Pregnancy test instructions were not strictly followed
  • Testing was done too early in your cycle

False negatives are very common on all brands, including ours; even if you are pregnant, testing seven days past ovulation leads to a 92.6% chance of a negative. We recommend testing from ten days past ovulation but again, if you are uncertain about the results, try retesting after a few days.

What can interfere with pregnancy test results?

At-home pregnancy test results can be affected if you take fertility medications containing hCG. In most cases, lactation, menopause, most medicines, and alcohol consumption do not affect the test results.

Will an ectopic pregnancy show a positive pregnancy test?

The embryo releases hCG hormone into the bloodstream of a pregnant person. A pregnancy test reacts to the hCG produced.

The implantation site, either on the uterine wall or another organ, does not matter for an ectopic pregnancy. Signs of an ectopic pregnancy include a slow increase of hCG in the blood and pain in the lower abdomen and/or blood spots.

Consult your health care provider if you suspect you may have an ectopic pregnancy.

When should an hCG level be rechecked?

After doing a test and getting positive results, your health care provider will test your blood to help monitor the changes in your hCG levels. A slow increase may not necessarily signify a problem, but it needs additional clarification.

Usually, the hCG levels will increase by 60% every two days or double every 48-72 hours after every two days.

If your hCG levels don’t double, it could be a sign of a nonviable pregnancy, whether extrauterine or intrauterine.

On the other hand, if your hCG levels rapidly increase, it can indicate, among other things, twins or triplets.

Pregnancy Test 10DPO
Is 10dpo too early to take a pregnancy test?

When should I use a pregnancy test?

A pregnancy test is done to help find out if you’re pregnant. The test looks for the human chorionic gonadotropin hCG hormone that only develops during pregnancy in a woman’s body. These tests use blood or urine to detect hCG, and At-home tests are not expensive and are commonly used for urine tests.

According to most manufacturers, at-home tests are approximately 99% effective. However, you have to follow the instructions provided to get accurate results. These tests don’t require a prescription and can be purchased in most grocery stores or pharmacies. The brand you are buying will determine its time to get results. Before you take the test, you need to read the instructions. Most tests can detect hCG levels in urine about ten days after conception.

On the other hand, blood tests are only done at a hospital or by your health care provider, and they only detect the presence of the human chorionic gonadotropin hormone in the blood. Blood tests can also determine how much of the pregnancy hormone is present. This test is mainly recommended for women in special circumstances using infertility treatments if your health care provider or doctor wants to check if you have a problem.

Blood tests usually detect minimal urine levels, and they are slightly more sensitive than urine tests. Therefore, they can provide more accurate answers during the early stages of pregnancy, usually between 9-12 days after conception.

How Do I Know If I’m Pregnant?

If you are unsure about being pregnant, consider taking a test to be sure. If you find out that you are pregnant, you need to start prenatal care. Home tests differ in how early they detect a pregnancy. Consider doing an at-home test 10 days after conception to increase your chances of getting a positive result. 

For an accurate result, it is best to take a test after you have missed your period. Taking a test too soon may lead to a negative result even when you’re pregnant. If you do the test and get a negative result and later miss your period, you need to take another test or visit your health care provider.

Ensure you check the expiry date before purchasing a home test. Then, if you take the test and the results come back positive, visit your doctor and have them test your blood to confirm the results.