Whens the earliest to take pregnancy test

You should wait to take a pregnancy test until the first day of your missed period. Since HCG is only present once implantation of the egg occurs, there often isn’t enough of the hormone to be detected until you miss your menstrual cycle.

“Pregnancy tests pick up the hormone secreted after implantation, which usually occurs about two weeks after the sperm meets the egg,” says Dr. Culwell. “For women who have regular periods, this usually means that HCG can be detected as soon as you miss a period.”

This, of course, assumes you have a regular menstrual cycle that can be easily tracked and predicted. If this isn’t the case, you may choose to instead track ovulation, or when an egg is released and makes its way to the uterus where it can potentially be fertilized. An at-home ovulation predictor kit can help you track fertilization.

If this method is used, it’s best to take a pregnancy test “approximately 14 days after a documented ovulation,” says Zaher Merhi, M.D., an OB-GYN, reproductive endocrinologist and founder of Rejuvenating Fertility Center with locations in New York and Connecticut.

Signs You Should Take A Pregnancy Test

The biggest indicator it’s time to take a pregnancy test is a missed period. It isn’t the only sign, however. Symptoms that signal it may be time to take a pregnancy test, according to Dr. Merhi, include:

• Missing a period
• Breast fullness/soreness
• Frequent urination
• Nausea
• Vomiting
• Fatigue
• Abdominal bloating

When Is the Best Time to Take a Pregnancy Test?

You can take a pregnancy test any time of the day. But if there’s a chance you’re early in pregnancy, take it in the morning when your urine is most concentrated so the test can more easily detect the HCG hormone, says Dr. Culwell.

“The best time in the cycle to take a test would be after you have missed a period,” says Dr. Culwell. “This will make it less likely that you might miss an early pregnancy if the HCG levels are too low to be picked up by the test.”

Where To Buy A Pregnancy Test

You can buy a pregnancy test at most drug stores and grocery stores, or even online.

How Soon Can You Take a Pregnancy Test?

At-home pregnancy tests are regulated by the Food and Drug Administration (FDA), meaning their accuracy and labeling is evaluated before they reach store shelves. When it comes to the accuracy of at-home pregnancy tests, research shows if the test is used as directed, an inaccurate result is rare. While false-positive pregnancy test results are uncommon, if you do receive an inaccurate result, it’s more likely to be a false-negative. In this case, it’s likely you’re testing too early, before HCG can be detected.

“For most women who have a regular menstrual cycle, a pregnancy test could be taken on the expected day of the period,” says Dr. Merhi. “The earliest [time to test] would be the expected day of the period; however, I usually tell patients to wait at least a few days (or one week) after the expected day of the period in order to lower the chances of having a false result.”

It’s worth noting that at-home pregnancy tests accuracy claims—many of which advertise an accuracy rate of 99% from the day of the expected period—are based on data used in a sterile laboratory testing environment. If you think you received an inaccurate result, you can either wait and test again a few days later or see your doctor for a blood test, which can detect HCG earlier than at-home tests and has an accuracy rate of 99%.

For a start, confirm your suspicion by buying an over-the-counter urine pregnancy test kit. There are many brands of pregnancy test kits available in the market, which are quite reliable. These are available at our local pharmacies. Alternatively, you could go to your doctor for a test.​ 

What is a Pregnancy Test Kit? 

During pregnancy, a hormone called human chorionic gonadotrophin (hCG) is produced, which circulates in the blood and is also present in the urine. 

The pregnancy test kit detects the presence of hCG in your urine. It is a qualitative test. Some pregnancy test kits are more sensitive than the others but most will be​ ​​​able to detect hCG between the fourth to fifth week of your pregnancy. This means that for those with regular cycles, the test should be positive once you have missed your period by a few days. 

Although almost all over-the counter pregnancy test kits detect pregnancy by measuring hCG in the urine, you have to read the instructions for the test kit because instructions for usage are different for different test kits. 

An indicator will show if you are pregnant. For example, some kits will show two bold lines if positive (Figure 6.2) and one bold line if negative (Figure 6.3). These indicators are different for various kits.​

​How Accurate are the Pregnancy Test Kits? 

Pregnancy tests are rarely wrong. It is more than 99% accurate. Thus, if your test is negative, it means that you are not pregnant; However, if you are very early in your pregnancy and the test is done too early, there could be insufficient amount of hCG in the urine for the test to detect. 

So, if a test comes back negative but you strongly suspect that you are pregnant, repeat the test in a few days’ time. 

There are rare examples when the hCG level is raised transiently and then drops to zero. This is known as “biochemical pregnancy” and could be the cause of a false positive result of the test kit. This initial rise of hCG levels would soon drop in “biochemical pregnancy” and result in a negative test result. Vaginal bleeding occurs soon after, which would coincide with “delayed menses”. Also rarely, there could be occasional ovarian tumors which secrete hCG and the false positive result could be wrongly interpreted as a pregnancy.​ 

​​​Frequently Asked Questions

1. Do I have to test with first morning urine? 

Although you can test any time of the day, your first morning urine specimen is usually the most concentrated of the day and would have the most pregnancy hormones in it. 

2. When should I take the test if I suspect that I am pregnant? 

You can test your urine as early as six days past ovulation but the first day of your missed period is recommended for greatest accuracy. 

3. Do I need a blood test for hCG to confirm my pregnancy? 

Blood tests for hCG are more accurate in detecting HCG and they can also measure the actual levels of the hormone. These tests may be useful to differentiate a miscarriage when the blood hCG will drop with time or a healthy pregnancy when the blood hCG level will double every two days. Occasionally, we need to follow-up the hCG levels to help us diagnose an early ectopic pregnancy (pregnancy that is ​outside the womb), which could be potentially life-threatening or confirm a miscarriage.

Acknowledgement

Source: Dr TAN Thiam Chye, Dr TAN Kim Teng, Dr TAN Heng Hao, Dr TEE Chee Seng John, The New Art and Science of Pregnancy and Childbirth, World Scientific 2008.

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