The pregnancy test stick is definitely not unfamiliar to women preparing for pregnancy. I hope my aunt won't come during those few days every month, and then I will take out a small pregnancy test stick to test the results of my hard work with my husband. As is well known, the appearance of a hurdle means that the revolution has not yet succeeded, and the young couple still needs to work hard; If there are two obstacles, congratulations, from now on you have a new identity - mom. But isn't it that simple? How much do you know about pregnancy tests? Do you know how to use a pregnancy test stick?
A pregnancy test stick is a commonly used tool to test whether a woman is pregnant or not. The principle is to determine pregnancy by measuring the HCG value in the female body. During pregnancy, women secrete a special hormone - human chorionic gonadotropin, which is a glycoprotein secreted by the trophoblast cells of the placenta, abbreviated as HCG. This hormone is present in both the blood and urine of women, and the pregnancy test stick determines pregnancy through the reaction between the built-in HCG antibody and urine. After implantation of the fertilized egg, during fetal development, the syncytiotrophoblast cells of the placenta produce a large amount of human chorionic gonadotropin (HCG), which is excreted into the urine through the mother's bloodstream. Therefore, the levels of HCG in serum and urine can rapidly increase between 1-2.5 weeks of pregnancy, reaching their peak at 8 weeks of gestation. Therefore, the pregnancy test stick is used to determine pregnancy based on the HCG value.
Generally speaking, the accuracy rate of a legitimate brand's pregnancy test stick is around 75% to 95%, not 100% accurate, let alone some female friends whose pregnancy test results are superficial. The obstetrician and gynaecologist of the Hospital of the National University of Defense Technology of the People's Liberation Army reminded that after you have detected your pregnancy with a pregnancy test stick, it is better to go to the hospital for a check.
In order to improve the accuracy of the pregnancy test stick, the following points should be noted when using the pregnancy test stick:
1. Pay attention to the production date on the packaging box and do not use expired early pregnancy test strips, as chemical agents can become ineffective over time or if stored improperly.
2. Before conducting a self-test, carefully read the instruction manual and then follow the instructions carefully.
3. The pregnancy test stick is generally more accurate when checked after a 7-day delay in the month. Because it is related to HCG in the body, it can only be clearly detected when HCG reaches a certain level, so it is best to use it after 7 days of delayed menstruation.
4. If the pregnancy has just begun or there is a possibility of ectopic pregnancy (ectopic pregnancy), the sample with low HCG levels in the body for detection should be left to stand for more than 3 minutes (usually only 1 minute), and it is necessary to carefully identify whether there is a weak positive. The color band in the detection area only appears faintly.
5. The best time for a pregnancy test is usually in the morning. The urine in the morning generally has the highest HCG value, which makes the results more accurate. If self testing is done in the evening, the accuracy will also be affected to some extent.
