Is there any pregnancy test stick can not detect

Things are inanimate objects and cannot be changed flexibly. Of course, if something goes wrong, there is no way to change it, so we should not rely too much on them. This is the principle of pregnancy test sticks. If a woman wants to confirm whether she is pregnant, the safest way is to see a doctor for diagnosis. Nowadays, many women rely too much on pregnancy test sticks. Some women are pregnant but the pregnancy test sticks are not correct. So, is there any situation in daily life where you are pregnant but cannot detect it with a pregnancy test stick?

1. Testing too early

Although the success rate of pregnancy test sticks from reliable and well-known brands is about 85% to 95%, if you are already pregnant, the pregnancy test stick will generally show a positive result. However, some issues need to be clarified, that is, women's ovulation time is around the 14th day of the menstrual cycle. If fertilization is successful at this time, it will take 6 or 7 days for the combination of sperm and egg to produce HCG. The pregnancy test sticks are all determined by testing urine HCG. In addition, HCG actually begins to secrete in large quantities after the fertilized egg embryo implants, and the transformed trophoblasts begin to secrete and produce a large amount of HCG. It takes at least 11 days for the fertilized egg embryo to implant. Therefore, if you want to use a pregnancy test stick to test pregnancy, it takes at least 6 days at first, and if you want the result to be accurate, it takes at least 11 days. Therefore, if the test is done too early, even if you are pregnant, no accurate result will be obtained.

2. Incorrect operation method

When using a pregnancy test stick to test urine, you should urinate towards the urine suction hole on the side of the pregnancy test stick or add urine drops so that the urine passes over the urine suction hole and maintain the urine collection time for about 1 to 2 seconds. If you do not prevent the urine from wetting the window when collecting urine, it will often cause the pregnancy test stick to be invalid and no result will be detected.

3. Other factors may affect the results

When using a pregnancy test stick to test urine, you should try to use the first urine in the morning for testing, because female hormones at this time are most easily detected. Some people do not pay attention to this situation, and even drink too much water to increase urine, which often causes the HCG level in the urine to be diluted, and finally leads to the situation that the pregnancy result cannot be detected. In addition, some therapeutic drugs may affect the level of HCG in urine, and ultimately affect the test results, so be sure to read the label carefully.