You may be pregnant, and to be safe, you go to buy a pregnancy test. But is it best to use a self-diagnosis product? Which product to buy? When should you use it?
Can a woman test herself as soon as she thinks she’s pregnant? No, of course not. Why? Because the tests detect the presence of a hormone called hCG, which is secreted by the fertilized egg when it implants in the uterus.
So if your ovulation occurred on day 14 of your cycle (counting from the first day of menstruation), the egg was fertilized at about the 16th day. It will then implant in the uterus around day 21. The HCG hormone starts to be secreted from the 23rd day. The rate will be high enough to allow a detection between 25th and 28th day (as tested), that is to say, should start when the following rules.
Can you buy pregnancy tests in supermarkets?
No, you can not buy pregnancy tests in supermarkets. They are sold only in pharmacies. If sometimes you can find in stores is that they do not respect the law. In any case, prefer to buy these products in pharmacies, you can ask for advice.
You can buy pregnancy tests online
Do not buy your tests especially on the internet! Certainly, one can find deals unbeatable, especially if you buy lots of 10. But you face two risks: first, they may not meet the American standards and be much less sensitive than those sold in the US. Moreover, it is fragile, gets affected by temperature differences. Those that you order may have traveled under abnormal conditions, their effectiveness is not guaranteed.
The products all have the same sensitivity
Not true, there are tests of different sensitivities. The most reliable are those that can detect 40 to 50 IU (international units) per liter of hormones. The early tests (three days before the expected date of rules) can detect a threshold of 25 IU. But there are still tests that detect only 100 IU / L.
False positives are common with pregnancy tests
A false positive is when the test says you are pregnant while you’re not. It is rarer today than in the past: previously, the tests were less specific and could detect incorrectly hormones other than hCG.
Today, a false positive will be linked to a specific cause: For example, if you are taking medications that contain hCG which is detected by the test (in the case of fertility problems, for example). The other cause is spontaneous abortion if such there was no implantation in the uterus. This result must be confirmed by a blood test to be sure.
False negatives are common with pregnancy tests A false negative is when you are pregnant but the test does not detect it. This is more common than false positives, but still very rare, thanks to the greater sensitivity tests. This can be explained by specific events, such as ovulation offset, which would have occurred at the end of the cycle.
This can also happen if you test too early. And hormone levels are too low. Everything then depends on the quality and accurate pregnancy test. It is in any case important to follow the instructions (well take the morning urine, wait the time specified before play) to avoid false negatives.
Note: If you’re trying to conceive, read this article.