How long can pregnancy be measured? How many days does menstruation defer calculate to be pregnant? Is pregnancy test paper accurate? Let's have a look
How long can pregnancy be measured
Modern urban life is very busy, many pregnant mothers may not be aware of their pregnancy early. So, in all stages of pregnancy, specifically, how long can pregnancy be measured? What is the accuracy rate?
7-day pregnancy test: less accurate
Because we determine that pregnancy is through the concentration of hCG in blood and urine, there is a process of hCG concentration change after pregnancy. Even if you use blood HCG to check early pregnancy, it needs to be measured 9 days after fertilization.
Blood HCG is used for early pregnancy test, which can only be determined after the 9th day of fertilization
10 day pregnancy test: can be detected by blood
Generally speaking, pregnancy can be measured in ten days by blood test. But the test of early pregnancy test paper and pregnancy test stick is not accurate at this time.
20 day pregnancy test: it can be measured by pregnancy test paper, pregnancy test stick and urine test
20 days of pregnancy can be measured, but at this time you want to confirm through B ultrasound may be a little early. It can't be seen with B-ultrasound 20 days after pregnancy. At this time, you can try to confirm the result through pregnancy test paper, pregnancy test stick, blood test, urine test, etc. If you want to be confirmed by B ultrasound, the best time is after 45 days.
A few days after menstruation
In addition to the above two methods of "pregnancy test tool" and "medical test" to determine whether you are pregnant, you can also consider using menstrual status to determine. Menstruation postponement is one of the symptoms of pregnancy, so how many days is menstruation postpone pregnancy?
The menstrual cycle of women is generally 28-30 days. It is normal to delay or advance for about 7 days, and the cycle length varies with people. But if more than 7 days has not come to menstruation, that is, menstruation delay. There are two main reasons for delayed menstruation: pregnancy and irregular menstruation. If you want to make a diagnosis early, it's different from person to person. You can test it 20 days early and 40 days later. Taking blood to test the hCG in the blood is a more accurate method for pregnancy test, but the mother can also test it on the household pregnancy test paper first.
Generally speaking, if menstruation is delayed for more than 7 days, early pregnancy test can be considered to determine whether 'lucky pregnancy' is possible. However, menstruation cessation does not necessarily mean pregnancy. The causes of menstruation delay may be gynecological diseases, excessive weight loss, mental factors, drug effects, etc. Therefore, menstruation regularity can only be used as a judgment method, not a diagnosis method. It is wrong to say that postponing menstruation means pregnancy.
Generally speaking, the following symptoms may be symptoms of 'you are pregnant'. If you have more than 8-10 kinds of phenomenon, it is better to go to the hospital to confirm whether you are pregnant.
1. Menstruation stop: This is the most common sign of pregnancy that people usually notice. As long as a woman of normal childbearing age has normal menstruation and has more than two weeks of normal menstruation after sexual behavior, she may be pregnant. But it's not that menstruation is not coming or pregnant. There are many reasons why menstruation is not coming. It may be because of poor ovarian function, abnormal hormone secretion, busy work, tense exam, etc., which will cause the phenomenon of late menstruation. So it's best to pass the diagnosis of a doctor, which is the safest.
2. The breast has tingling, swelling and itching: the breast has tingling, swelling and itching, which is a physiological phenomenon in the early stage of pregnancy. In addition, there will be changes such as the color of areola becomes darker, the subcutaneous vein of the breast is obvious, and the nipple is prominent.
3. Nausea and vomiting are often felt: almost many pregnant women at the early stage of pregnancy often feel nausea and vomiting, especially at the beginning of the day. These symptoms vary from person to person, some of them are quite mild, others are very serious. Unless nausea and vomiting are very severe, and medical treatment is needed, these are normal phenomena in the early stage of pregnancy.
4. There are changes in skin color: there may be pigmentation of skin or stretch marks on the abdominal wall, especially in the late pregnancy.
5. Discoloration of vaginal mucosa: in the early stage of pregnancy, the vaginal mucosa may show darker color due to hyperemia, which is judged by the doctor.
6. Easy to get tired: easy to get tired in the early stage of pregnancy, often want to sleep. ...
Is pregnancy test paper accurate
Many reactions of pregnant women, using early pregnancy test paper to test pregnancy, the results are not necessarily accurate. Why? Is the pregnancy test accurate? Let's take a look.
The errors in the early pregnancy test are due to these reasons:
1. Urine with blood, or take some fertility drugs, will lead to a positive test results;
2. Drinking too much water to dilute the urine may lead to false negative results.
3. In the case of recent pregnancy, the test results are not accurate. Because hCG can continue to be positive for a long time after termination of pregnancy (after childbirth, natural abortion and induced abortion).
4. Some diseases and drugs may cause false positive test results. Some tumor cells, such as hydatidiform mole, choriocarcinoma, bronchial cancer and renal cancer, can also promote the secretion of hCG.
Therefore, if the self-test results are negative, and the menstruation is still in the future after one week, you should do the self-test again. If it's not positive, it's better to see a doctor.