How many days of pregnancy can be checked by blood test

Nowadays, many people use test strips to check their pregnancy. This method saves time and effort and can be performed at home. However, some people cannot detect the pregnancy in the first few days, so some people choose to go to the hospital for blood tests. Blood tests are more accurate, so how many days of pregnancy can a blood test detect? I think everyone still hopes to have a grasp of it, and does not want to check it too early and get inaccurate results. The following is a detailed introduction for everyone.

How many days of pregnancy can be checked by blood test

Generally speaking, a blood test 9-11 days after a couple's sexual intercourse can determine whether they are pregnant. Generally, it is judged by testing the HCG concentration in the blood, that is, the concentration of human chorionic gonadotropin. However, the change of HCG concentration in the blood during pregnancy goes through a process, so the longer the time after sexual intercourse, the more accurate the test.

The professional term for blood test is blood HCG test. This method is to test whether they are pregnant by accurately measuring the HCG level in the blood of female friends. Generally speaking, men and women can have a blood test for HCG 8 to 10 days after having sex to confirm whether they are pregnant. Generally speaking, the use of early pregnancy test strips and other urine HCG tests can only be performed 7 days after a woman's menstruation stops.

The HCG blood test for pregnancy can usually be carried out 1-2 days after the menstrual period has ended, so that the time of pregnancy can be determined earlier and more accurately, so as to be fully prepared. Compared with urine tests, HCG pregnancy blood tests are more accurate and have a very small error. Therefore, when you go to the hospital for an examination, the doctor will recommend a blood test for HCG pregnancy test. This is because the HCG value checked by the "quantitative analysis" of women's blood is more sensitive and accurate than the results of early pregnancy test strips. According to clinical nursing instructions, the accuracy of pregnancy blood test is over 99%.

In addition, if it is a multiple pregnancy, ectopic pregnancy, hydatidiform mole or tumor, the gynecologist will conduct a comprehensive analysis by combining the blood HCG value with the clinical condition and other test results to make a correct judgment. Many female friends are worried about whether they need to fast before the HCG blood test. It is reminded that female friends do not need to fast before the HCG blood test, and it generally has no effect on the test results.

What are the key symptoms of early pregnancy?

1. Interruption of menstruation: Under normal circumstances, it is normal for menstruation to be delayed by about seven days, but if it is delayed for more than ten days, you need to check whether you are pregnant. Of course, sometimes mental stress, anxiety and some gynecological inflammations may cause delayed menstruation. Therefore, when menstruation is delayed for more than 10 days, you can go to the hospital for further confirmation.

2. Nausea: Chest tightness and vomiting are typical symptoms of pregnancy, and the symptom appears relatively early. Generally speaking, after six months of pregnancy, as the body gradually adapts to the pregnancy, the symptom will gradually be alleviated. In addition, different people have different manifestations of morning sickness. Some pregnant women will feel like vomiting all day long, while others may feel like vomiting at certain times of the day, such as in the morning and at night.

3. Frequent urination and urgency: Frequent urination and urgency is another typical symptom of pregnancy, and it is also a weather phenomenon during pregnancy. Pregnant mothers do not need to worry too much. Generally, after 12 weeks of pregnancy, as the uterus gradually expands beyond the pelvis, this symptom will naturally be alleviated.

4. Changes in body temperature during ovulation: The body temperature will fluctuate during pregnancy. The body temperature of normal women during ovulation shows a double curve, that is, their body temperature will change before and after ovulation. The female body temperature will be relatively high during the ovulation period. If the menstrual period is delayed, and the body temperature during ovulation does not drop after rising, and lasts for more than ten days, then it is very likely that you are pregnant.