What do you mean by negative pregnancy test?

Prepregnancy testing is very necessary. Under normal circumstances, pregnancy test paper can detect pregnancy. The accuracy of early pregnancy test paper is very high, and early pregnancy test paper is very easy to use. What does a negative pregnancy test mean?

What do you mean by negative pregnancy test? Generally, the detection of early pregnancy test paper indicates that it is pregnant and negative indicates that it is not pregnant. About 10 days after pregnancy, pregnant women will secrete a chorionic gonadotropin in their urine. At this time, urine will be taken for testing. If it is positive, it can be diagnosed as pregnancy with an accuracy rate of 99%. It is best to use morning urine for early pregnancy examination, because this time is the best time for detection, and the HCG value itself is obviously increased. And the best time for early pregnancy test paper is about one week after menstrual cycle, and the detection at this time is often very accurate. If after the early pregnancy, the body will begin to feel uncomfortable, the most common is menopause, and female friends will also begin to feel drowsy and lose appetite.

If the pregnancy test is negative, it means you are not pregnant. If it is an early pregnancy test paper, a line is displayed. Pregnancy test is to detect HCG in urine or blood, and the detection effect is very accurate. Generally, it can be detected as long as menstruation is delayed. This test is based on early pregnancy test paper. When a male's sperm is combined with a female's egg and the fertilized egg is implanted into the uterus, a new hormone called chorionic gonadotropin (HCG) is produced in the female body, and its physiological function is to maintain pregnancy. This hormone can be detected from urine by early pregnancy test paper from 7 days after conception to 10 days.

1, positive: a red reaction line appears at the position of detection line and control line, indicating that two red lines will appear on the test paper; The color of the test line is darker than the control line, indicating that it is strongly positive, indicating that it has been pregnant for some time. 2. Negative: There is only one red reaction line at the position of the control line. 3. Invalid: there is no red reaction line on the test paper, or there is only one reaction line on the detection line, indicating that the experiment failed or the test paper failed, and it is necessary to try again with a new test paper.

For examination papers, we need to pay attention to many things. If we don't pay attention to it, it will probably affect the accuracy of the test paper, so this is a problem worthy of attention and the reason why we must go to the hospital to confirm the test results.

How long can I be pregnant to measure my gender? At present, the most intuitive and clear fetal sex is B-ultrasound. Generally, the sex of the fetus can be known about 4 months after pregnancy. At the weekend of pregnancy 12, the external genitalia of the fetus has developed. By the weekend of pregnancy 16, the sex of the fetus can be determined from the external genitalia. When the fetal position is good, the judgment will be more accurate, so B-ultrasound is influenced by the doctor's experience and fetal position. Parents-to-be should pay attention to that although B-ultrasound can clearly see all organs and parts of the fetus, including genitals, it is illegal to identify the sex of the fetus by B-ultrasound in China at present.

Besides traditional B-ultrasound, amniocentesis and villus sampling can also be used to identify the sex of the fetus. Amniocentesis is mainly used for the auxiliary examination of Down's screening and the judgment of some genetic diseases, which can detect whether the fetus has chromosomal abnormalities. The best time for amniocentesis is in pregnancy 17-2 1 week. But expectant mothers should remember that amniocentesis is an invasive examination, and the risk of abortion is 1%. If it is not necessary for expectant mothers to have this test, it is best not to take this risk, let alone use this method to check the sex of the fetus.

Normal women's menstrual cycle is 28-30 days, and it is normal to advance or postpone menstruation for 7 days, but if it exceeds this time, women should pay attention. How many days does menstruation delay count as pregnancy? Generally speaking, women of childbearing age have regular menstruation. If a woman does not use contraception or fails to use contraception in her usual sexual life, and her menstruation is delayed for more than 7 days, the possibility of pregnancy is not ruled out. It is recommended to go to the hospital for a B-ultrasound or blood HCG test to find out whether you are pregnant or not, or go to the pharmacy to buy a pregnancy test stick for a preliminary judgment. In addition to delayed menstruation, female friends can also judge whether they are pregnant according to the symptoms of early pregnancy. General early pregnancy reactions include nausea, vomiting and breast pain.

Delayed menstruation is only one of the reactions after pregnancy, and delayed menstruation does not necessarily mean pregnancy. There are other reasons for delayed menstruation, such as abnormal schedule. According to the research, the cold stimulation of women's menstrual period will cause excessive contraction of blood vessels in pelvic cavity, which can cause oligomenorrhea and even amenorrhea. Therefore, women's daily life should be regular and avoid overwork, especially during menstruation.