What to do if the pregnancy test stick expires

There are many factors that affect the accuracy of pregnancy test sticks. For example, incorrect operation methods or insufficient pregnancy time will affect the accuracy of pregnancy test sticks. Some people take certain medications before the test, which may also cause inaccurate test results. For convenience, many people buy many pregnancy test sticks at one time and place them at home, causing many pregnancy test sticks to expire. So will expired pregnancy test sticks affect the pregnancy test results?

The accuracy of pregnancy test sticks is about 85% to 95%.

Principle: The urine hCG test is to check the hCG contained in the urine. Human chorionic gonadotropin (hCG) is a hormone secreted by pregnant women and can be detected through urine and blood tests. General pregnancy test agents use the reaction of single and multiple hCG antibodies in the device binding to antigens in the urine to determine whether the pregnancy is present. It is commonly known as pregnancy test sticks, pregnancy test pieces or pregnancy test cards.

Ovulation occurs around the 14th day of the menstrual cycle. Assuming fertilization is successful at this time, it will take at least 6 or 7 days for the fertilized egg to produce HCG. Pregnancy test sticks are determined by testing urine HCG. HCG actually starts to be secreted in large quantities after the fertilized egg implants. The syncytial trophoblast begins to secrete large amounts of HCG, and it takes at least 11 days for the fertilized egg to implant. If you want to test more accurately with a pregnancy test stick, wait 11 days before using the pregnancy test stick to test whether you are pregnant.

Factors that affect the accuracy of pregnancy test sticks include:

1. Improper operation

2. Pregnancy is too short

3. Taking drugs that affect the results before the test

4. The test product is expired or damp, etc.

All of the above factors may cause inaccurate pregnancy test results.

The accuracy rate of pregnancy test sticks from regular brands is about 85% to 95%.

First, we need to clarify some issues. Ovulation occurs around the 14th day of the menstrual cycle. Assuming that fertilization is successful at this time, it will take at least 6 or 7 days for the fertilized egg to produce HCG. Pregnancy test sticks are determined by testing urine HCG. HCG actually starts to be secreted in large quantities after the fertilized egg implants, and the syncytial trophoblast begins to secrete large amounts of HCG. It takes at least 11 days for the fertilized egg to implant.

So, the earliest is 6 days, and if you want to be more accurate, wait until after 11 days. Just in case, it is best to go to the hospital to check whether you are pregnant.

It seems that an expired pregnancy test stick will affect the results of the pregnancy test. So don't buy a lot of them at one time for convenience, so that you can't use them up and let them expire. This will not only fail to achieve the purpose of the pregnancy test, but also waste a lot of money. Remember to go to the pharmacy to buy them when you need them. When buying them, you should also check the shelf life to avoid buying expired pregnancy test sticks and causing inaccurate pregnancy tests.