The pregnancy test stick is darker and lighter, which may not mean pregnancy

　　The most sensitive red stick in the world, except perhaps the famous five-striped boy, is the one that makes everyone female I have a love-hate relationship with pregnancy tests. Pregnancy test sticks can generally detect one or two bars. The one with one bar is considered the team leader, which means that you are not pregnant. ； The one with two stripes is the squadron leader, which means she is pregnant. ； It is reported that there are many lucky women preparing for pregnancy who have encountered the captain of the three stripes.……

　　The reason why there is a mixture of love and hate is that some people meet the squadron leader when they don't want to get pregnant, and some people are eager to get pregnant but always deal with the squad leader. So if the pregnancy test stick is darker and lighter, does it mean that I am pregnant?

　　What does the dark and light pregnancy test stick mean?

　　Many friends have expressed doubts about the color development of the pregnancy test stick. What does the color of the pregnancy test stick mean? Let’s learn how to read a pregnancy test stick together. Generally speaking, there are several situations when the pregnancy test stick will show color:

　　1. Only one control line appears on the pregnancy test stick: it means not pregnant.

　　2. Two lines appear on the pregnancy test stick, that is, the control line and the test line are both colored, and the test line is clearly clear: it means that you are pregnant.

　　3. No control line appears on the pregnancy test stick within 5 minutes: the test is invalid or failed.

　　4. The pregnancy test stick has one dark color and one light color: Generally speaking, if the control line is obviously clear and the test line is very light, it means that you may be pregnant, but it does not necessarily mean that you are actually pregnant. In this case, you will need to collect morning urine again every two days using a new pregnancy test stick.

　　Therefore, if the pregnancy test stick is darker and lighter, it means you may be pregnant, but don't be too happy because it may also mean you are not pregnant. The probability is 50% each.

　　Since the pregnancy test stick occasionally appears to be one dark and one shallow, many friends will question whether the pregnancy test stick is accurate. So are pregnancy tests accurate? How long does it take for a pregnancy test to tell whether I am pregnant? What factors affect the accuracy of pregnancy tests?

　　Are pregnancy tests accurate?

　　The pregnancy test stick is an early pregnancy detection tool that many young women are familiar with. Its biggest advantage compared with other pregnancy test tools is that it allows many female friends to know whether they are pregnant at home without going to the hospital at all. Hospital , the principle of pregnancy test stick is to quantitatively detect the content of human chorionic gonadotropin in urine to know whether you are pregnant.

　　Generally speaking, the accuracy rate of regular brand pregnancy test sticks is about 85% to 95%.

　　Therefore, the pregnancy test stick is not 100% accurate. Not to mention that the pregnancy test stick is darker and lighter does not mean that you are really pregnant. Even if it detects two lines, sometimes it may not mean that you are really pregnant.

　　If you want to confirm whether you are really pregnant, you still have to go to the hospital for a more accurate examination!

　　How long does it take for a pregnancy test to tell whether I am pregnant?

　　Ovulation occurs around the 14th day of the menstrual cycle. Assuming fertilization is successful at this time, it will take 6 or 7 days at the earliest for the fertilized egg to produce HCG. Pregnancy tests are judged by measuring urine HCG. HCG actually begins to be secreted in large amounts after the pregnant egg implants, and syncytiotrophoblast cells begin to secrete and produce large amounts of HCG. It takes at least 11 days for a pregnant egg to implant. Therefore, it only takes 6 days at the earliest for a pregnancy test to determine whether you are pregnant. Of course, if you want to be more accurate, wait until 11 days later, when it will be more accurate.

　　The pregnancy (positive) result can be read after 1 minute (30 seconds at the fastest). This means that if two lines are clearly displayed after 1 minute during the test, the result is pregnant (positive) and there is no need to wait for 3 minutes before reading.

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

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

　　What factors affect the accuracy of pregnancy tests?

　　Factors that affect the accuracy of the pregnancy test stick include improper operation, too short a pregnancy, taking drugs that affect the results before the test, expired test products or moisture, etc. These will cause inaccurate results of the pregnancy test stick.

　　In order to improve the accuracy of the pregnancy test stick, you should pay attention to the following points when using the pregnancy test stick:

　　1. Pay attention to the production date on the packaging box, and do not use expired pregnancy test strips, because the chemicals will become ineffective if they are stored for a long time or are not stored properly.

　　2. Read the instructions carefully before taking the self-test, and then follow the instructions carefully.

　　3. Pregnancy test sticks are generally more accurate when the menstrual period is delayed by 7 days. 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 menstruation is delayed for 7 days.

　　4. If pregnancy has just begun, or if there is ectopic pregnancy（Ectopic pregnancy ), the HCG level in the body is generally low. The sample for testing needs to be left for more than 3 minutes (usually only 1 minute), and it must be carefully identified whether there is a weak positive, and the color band in the detection area only appears faintly.

　　5. The best time to take a pregnancy test stick is generally in the morning. Morning urine generally has the highest HCG value, so the results are more accurate. If you do a self-test in the evening, the accuracy will be affected to a greater or lesser extent.