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Taking a Pregnancy Test

Taking a pregnancy test can be filled with excitement for some people, whereas for others it may be a little intimidating. Before you take a pregnancy test, you might check to see if you are experiencing any pregnancy symptoms. A missed menstrual cycle is the most common symptom leading a woman to take a pregnancy test. Below are several answers to common questions related to taking a pregnancy test

How does a test tell if you are pregnant or not?

A pregnancy test detects the presence of a hormone called human chorionic gonadotropin (hCG) in your blood or in your urine. hCG is produced in the placenta shortly after the embryo attaches to the uterine lining and builds up rapidly in your body in the first few days of pregnancy.

How long do I have to wait before I take a test?

Most doctors recommend that you wait until the first day of your missed period before taking a home pregnancy test. A missed period is usually one of the first signs of pregnancy. This is usually around two weeks after conception. However, some tests are more sensitive (and more expensive) than others and can be taken earlier. Concentrations of hCG are reported in milliInternational Units (mIU) or amounts equal to 1/1000th of an IU per millilitre. A pregnancy test with a sensitivity of 20 IU/L is more sensitive than one with 50 IU/L.

A blood test administered by your doctor is more sensitive than the early home tests and can be taken between seven and twelve days after you conceive. ( It is possible that these tests can be done  too early and show a false negative result.) If you receive a negative result and still do not start your period, another test should be done.

How accurate are home tests?

Home tests are very accurate (around 97%) when used correctly. Some kits come with two tests because mistakes do happen.

If you take a test too early, you may get a false negative (when the test says you are not pregnant but you are). Your body needs time for the hormone to rise to a high enough level to be detected in a test. If the test comes back negative but you still think you could be pregnant, wait a few days and try again.

False positives (when the test says you're pregnant but you're not) are possible, but rare. A positive pregnancy test is a pretty good indication that you are pregnant.

What home test products can I use?

Two home pregnancy test products you could commonly purchase at a Canadian pharmacy are "First Response" and "Clear Blue"

First Response 2016    Clearblue

** Sources provided by American Pregnancy Association.