Are expired pregnancy tests still valid?

Once women find that their menstruation is delayed, different women will have different feelings. If they want to get pregnant, they will definitely be very happy, but if they don’t want to get pregnant at all, they will be very nervous when their menstruation is delayed, and they will be afraid that they are pregnant. In fact, if you want to know whether you are pregnant, the best way is to use a pregnancy test stick. So, if the pregnancy test stick is expired, is the test result still valid?

Are expired pregnancy tests still valid?

The main principle of the pregnancy test stick is to detect the HCG value, which is the value of human chorionic gonadotropin one month after pregnancy.

It is a hormone secreted by pregnant women and exists in urine and blood. It usually appears in urine a few days after pregnancy, but due to the small amount, it is not easy to test it at the beginning, and it will not become increasingly obvious until 10 to 14 days.

Therefore, it is recommended to test 10-14 days after the menstrual period is delayed, and try to use the first urine in the morning for testing.

It is relatively accurate to test within one month of pregnancy or 7-10 days after menopause. When using it, you should choose the first urination in the morning for higher accuracy. Generally, HCG will appear in the urine a few days after the fertilized egg and sperm combine, and it must reach a certain ratio to be detected. It also depends on the method of use. If it is used improperly, there will be errors.

Using a pregnancy test stick in the morning or evening may have a certain impact on the results. The highest HCG value is generally found in morning urine, so many instructions recommend testing in the morning, but this is not absolute. Here is a piece of advice for everyone: early pregnancy test strips are not the most accurate, and there are times when the test is inaccurate. It is only used as a standard for preliminary examination. It is best to go to the hospital for an HGC test.

How long does it take for a pregnancy test stick to detect pregnancy? Some people have the wrong idea that they can use the test paper to test on the day they suspect pregnancy, or the couple rushes to buy test paper to test the next day after having sex. The result can be imagined. When using the test paper, you should pay attention to how many days it takes for the test paper to detect pregnancy.

The couple used a test strip to test the day after having sex. At this time, it is almost impossible to use a pregnancy test stick to detect whether the pregnancy is true or not. The result is often that the second horizontal line cannot be seen, but this does not mean that the pregnancy is definitely not true. Choose morning urine for self-testing at least 10 days after having sex, as the concentration of HCG in morning urine is higher.

It takes several days for sperm and egg to combine into a fertilized egg, implant into the uterus, and form an embryo. HCG will only appear in the blood a few days after pregnancy, and because of the small amount, it may not be detected at the beginning.