There are several reasons why pregnancy test sticks are invalid

Many people have encountered the situation where the pregnancy test stick is invalid. Many people are confused when encountering this situation. In fact, there are two reasons for this situation. One is that the pregnancy test stick is expired, and the other is improper operation.

Some young couples put having children on the agenda after getting married, especially when the woman's menstruation is delayed after having sex, they want to know if they have won the lottery and want to know whether they are pregnant at the first time. At this time, they usually don't go to the hospital for testing, but think about going to the pharmacy to buy a pregnancy test stick to test whether they are pregnant. When they go to the test with excitement, they unexpectedly find that the pregnancy test stick is not very effective. For example, the pregnancy test stick shows invalid, which is even more confusing. What's the matter with the invalid pregnancy test stick, and how to use the pregnancy test stick correctly?

First of all, everyone knows that the most economical and convenient way to check whether you are pregnant is to use a pregnancy test stick. When purchasing, female friends should carefully check the production date and shelf life of the pregnancy test stick to see if the pregnancy test stick has expired. If it has exceeded the expiration date, the pregnancy test stick will become invalid after use.

Secondly, if you are using a pregnancy test stick for the first time, you may wish to take a closer look at the instructions for use of the pregnancy test stick. There are detailed instructions for use, as well as simple and clear graphic instructions. You can follow the instructions step by step to avoid invalid situations caused by improper operation. Therefore, you may wish to spend more time reading the instructions during use to ensure the correctness of the operation.

In addition, morning urine is the best way to test pregnancy with a pregnancy test stick, especially in the early stages of pregnancy. It is best for female friends to use the first urine in the morning as the basis for the pregnancy test. This way the test result is most accurate, and generally one or two minutes later you can determine whether you are pregnant.

Is your wife pregnant if her period is delayed? Try it before you get excited! There are at least 4 ways to test for pregnancy. Do you know which one is the most reliable?

Pregnancy test paper, pregnancy test stick

Accuracy: ★★★☆☆

Pregnancy test strips or sticks are used to determine whether the urine contains HCG, which is unique to pregnancy. Although manufacturers claim that early pregnancy can be detected on the first day of implantation, which is the eighth day of ovulation, most products are not that sensitive. It takes at least 11 days after ovulation to detect early pregnancy. If you want to get the correct result, it is best to do the pregnancy test strip test when your period is delayed for two weeks.

Instrumental urine test

Accuracy: ★★★★☆

The amount of HCG in urine can only be detected when it reaches a certain level, and if the test is done too early, the amount of HCG in urine is not enough for the test instrument to react. Going to the hospital for a urine test should be done at least one week after menstruation.

PS: Early pregnancy test strips and pregnancy test sticks also judge the results by detecting the HCG concentration in urine.

Blood HCG test

Accuracy: ★★★★★

Nine days after ovulation, you can check the HCG concentration in your blood to determine whether you are pregnant. HCG is a specific hormone secreted during pregnancy. The HCG concentration in the blood is very low when you are not pregnant, and it increases significantly after pregnancy. In the early stages of pregnancy, the HCG concentration will continue to increase, increasing by about 1.5 times every two days, reaching a peak in 6-12 weeks, and then slowly decreasing until it reaches stability in 18 weeks.

B-ultrasound pregnancy test

Accuracy: ★★★★★

B-ultrasound confirms pregnancy by detecting whether there is a gestational sac in the uterus. Compared with testing HCG, progesterone and other hormones, B-ultrasound pregnancy testing is actually more intuitive and accurate. After 5 weeks of pregnancy, the diagnosis can be confirmed by sonogram. Under normal circumstances, a round or oval anechoic dark area appears in the uterus after pregnancy, with an average diameter of about 0.5-1.5cm. A thicker ring-shaped stronger echo can be seen around the anechoic dark area, and sometimes the bud-like light group echo of the embryo can be seen.

PS: There is some controversy about the safety of B-ultrasound examination. However, if your wife has some abnormalities in early pregnancy: too low HCG concentration in the blood, slow increase, spotting, pain in the lower abdomen, these symptoms suggest the possibility of ectopic pregnancy, and B-ultrasound is needed for further examination.

3.1. High accuracy: The accuracy of the pregnancy test stick is approximately between 85% and 95%. Due to the use of multi-layer super-sealed aluminum foil film packaging, the pregnancy test stick is not easily affected by moisture for a long time. Even if the product is stored for 2 to 3 years, it still has a good quality level.

3.2. Quick response: The pregnancy test stick can display the result within 1 minute, and the fastest can be 30 seconds.

3.3. Easy to use: The unique patented design of the pregnancy test stick for direct urine collection eliminates the trouble of using a urine cup or a straw to collect urine. You can urinate directly on the urine suction hole of the pregnancy test stick and read the result from the observation window. When collecting urine, wear the included disposable plastic film gloves to prevent accidental splashing of urine on your fingers. The whole process can be easily completed in the bathroom. The pregnancy test stick can be discarded after testing, which not only protects privacy but is also clean and hygienic, and is very convenient.

TOP1, David Early Pregnancy Test Kit

Positive review: Very accurate, easy to use, and very affordable.

TOP2, Wanhua Yuyou Early Pregnancy Test Strips

Good review: At that time, Little B had not appeared yet, but I felt something was wrong. My relative who should have reported that my period had not come, and I always felt depressed, so I decided to take a test to see if I had won the prize!

TOP3. Xiuer Early Pregnancy Test Strips

Good review: I used it to discover the baby's existence! Haha

TOP4. Quick pregnancy test strips

Positive reviews: Easy to use, reliable results, you can buy it and try it before going to the hospital.

TOP5, Conage Early Pregnancy Test Card

Good review: I used this when I was pregnant, and the accuracy rate is quite high. The price is much cheaper than other products. It is really good value for money.

TOP6. Good Time Early Pregnancy Test Strips

Good reviews: It is very convenient to use, and one plate per person makes mothers feel more at ease!!

TOP7, Ladies Pregnancy Test Kit

Positive review: Reasonable price, easy to use, and very accurate.

TOP8. Good Luck Pen Early Pregnancy Test Paper

Positive review: Very good, quite accurate.