The pregnancy test is negative, but the period is not coming. Generally speaking, taking morning urine for pregnancy test has higher accuracy. Before a pregnancy test, we must first clarify some problems. Ovulation is about the first 14 day of the menstrual cycle. Assuming that fertilization is successful at this time, it takes 6 or 7 days for the fertilized egg to produce HCG at the earliest, while the pregnancy test stick is judged by measuring HCG in urine, and it takes at least 1 1 day for the pregnant egg to be implanted. So it can be tested in 6 days at the earliest. If you want to be more accurate, wait 1 1 day. Therefore, the choice of pregnancy test time is very important, which affects the accuracy of pregnancy test.
If the pregnancy test stick has no result, the reason may be that the use method is inaccurate, or the test paper has expired or failed. Therefore, we should pay attention to the choice of pregnancy test stick, buy a regular brand that has not expired, and pay attention to the use method.
Therefore, it is not impossible to have a pregnancy test at noon, but it is more recommended to have a pregnancy test in the morning. It is recommended to use the first urine test in the morning as much as possible, because the hormone level is the easiest to detect at this time. If it really doesn't work, you can go to the hospital for early pregnancy examination.
When is the pregnancy test stick the most accurate? One month after pregnancy or 7- 10 days after menopause, the detection is relatively accurate. When using it, you should choose to urinate for the first time in the morning, and the accuracy will be higher. Generally, HCG will appear in urine only after a few days after fertilized eggs combine with sperm, and it can only be detected after reaching a certain proportion. It also has something to do with the method used. If used improperly, errors will occur.
Using a pregnancy test stick in the morning and evening may also have different results and have a certain impact. Morning urine generally has the highest HCG value, so many instructions recommend morning testing, but this is not absolute. Let me give you a suggestion. Early pregnancy test paper is not the most accurate, and sometimes it is not. It is only a standard for preliminary examination. It is best to go to the hospital for HGC examination.
I can't detect the symptoms of pregnancy, and my period doesn't come. The general symptoms of early pregnancy are tingling nipples, dull pain in the lower abdomen, lethargy, low immunity and easy to catch a cold. Leucorrhea will increase before menstruation, and some people are accompanied by dull pain in the lower abdomen and breast pain. To know whether you are pregnant or not, you can judge by many early pregnancy tests. No matter which method is adopted, the best time for early pregnancy detection should be delayed for more than one week at the next menstruation. Because delaying menstruation by one week is one of the signs of early pregnancy, doing early pregnancy test at this time can improve the accuracy of early pregnancy test. Early pregnancy examination should generally be carried out for the first time about 40 days after menopause. Have a gynecological examination to confirm pregnancy. Judge whether pregnant women can continue to be pregnant. Early pregnancy examination can determine whether the size of uterine hearing is consistent with the time of menopause, so as to understand the development of embryonic platform, and can find abnormal reproductive organs and gynecological diseases.
Early pregnancy test paper can only show positive after 35 days of pregnancy, and pregnancy cannot be detected after five days of sexual intercourse. After the fertilized egg is implanted, hcg secretion will increase. According to the blood HCG value, it can be determined whether you are pregnant or not at the earliest after the same room 10.
Because after sperm and eggs combine into fertilized eggs, embryos will be implanted into endometrium about 6-8 days after fertilization, blastocysts will form trophoblast cells, and then the placenta will start to divide HCG in urine at 7- 10 days. It is scientific to detect pregnancy from urine after sexual intercourse 18 days. The earliest seven days after sexual life, but the amount of HCG secreted by it is very small, usually around 14 days, and a few can be found pregnant in more than 20 days. Detection of HCG in maternal blood or urine is an accurate index to diagnose early pregnancy, but it is recommended to go to the hospital for blood HCG detection, which can quickly and accurately check whether there is pregnancy. Women do pregnancy self-test at home without any external guidance, and usually the test results can only reach 50% to 80% accuracy. If the test is carried out in front of the doctor in the laboratory, the doctor can ensure that the test paper works normally, and women can use the test paper correctly according to the instructions, and the test accuracy is likely to be close to 100%.