Are there times when pregnancy tests are inaccurate?

Many people will choose to use pregnancy test sticks to detect whether they are pregnant after their menstruation is delayed, but the accuracy of pregnancy test sticks is not 100%, so sometimes the test results will be inaccurate. The general accuracy rate is around 85%, so it is more reliable to go to a regular hospital for examination. So, are there times when pregnancy test sticks are inaccurate? Let’s find out.

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

First of all, 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. If you want more accuracy, wait until 11 days, as it will be more accurate then. You can make your own guess.

The pregnancy (positive) result can be read after 1 minute (30 seconds at the fastest), which means that if two lines are clearly shown after 1 minute of testing, it indicates a pregnancy (positive) result and there is no need to wait for 3 minutes before reading.

The result of not being pregnant must be confirmed after 3 minutes. This is because in the early stages of pregnancy, the HCG hormone content in the urine is very low, and a weakly positive result may appear during the test. The weakly positive result may not be displayed after 1 minute. As the reaction time increases, it will take 3 minutes for two lines to appear. At this time, the appearance of two lines should still be interpreted as a pregnancy (positive) result. If there is still only one control line after 3 minutes, it can be judged as a not being pregnant (negative) result.

The results judged after 5 minutes are invalid! This is because the results judged within 5 minutes are used as the experimental basis for designing products. The results judged after more than 5 minutes or even longer are not clear. Some people may have false positive results, and this result does not represent the actual situation.

The above has briefly introduced the relevant analysis of whether the pregnancy test stick is inaccurate. The pregnancy test stick is a relatively cheap pregnancy test tool and generally will not be inaccurate. In order to make the test results more accurate, you can actually choose to test after getting up in the morning, which will improve the accuracy.