How many days of pregnancy can a blood test show?

Pregnancy is a very important thing for every woman, and every woman will pay great attention to this matter. There are many pregnancy test methods before confirming whether you are pregnant, and blood test is a very common method. It is a method to determine whether a pregnant woman is pregnant by checking the HCG in her blood. However, she needs to be pregnant for a while before she can be detected. Here we will introduce how many days of pregnancy it takes to detect it by blood test.

How many days of pregnancy can be detected by blood test

A blood test is a method of pregnancy testing. It mainly uses HCG in the blood to diagnose whether a woman is pregnant. This method of detecting whether a woman is pregnant is relatively accurate.

However, the prerequisite is that female friends must choose the right time for pregnancy test before doing blood test. A blood test for pregnancy is currently the earliest method to determine whether a woman is pregnant after having sex. The principle of detecting pregnancy is mainly to determine whether a woman is pregnant by quantitatively testing the level of human chorionic gonadotropin in the blood.

Generally speaking, you can have a blood test for pregnancy 10-14 days after having sex. If the test result is positive, you are pregnant. Conversely, if the test result is negative, you are not pregnant. The test results of 2, 5, 4.27 all indicate the HCG value in the blood.

If the blood pressure is lower than normal, you should consider pregnancy. You must be fully prepared before taking a blood pregnancy test. Generally speaking, the accuracy of blood pregnancy tests is very high. You don’t need to fast before the test, but it is better to fast to ensure accuracy.

It doesn't take long to draw blood for a pregnancy test, about two or three minutes. However, the only drawback of blood pregnancy test is that it can only confirm pregnancy but cannot determine whether it is an ectopic pregnancy. However, this shortcoming can be compensated by doing B-ultrasound examination.

How long does it take for a pregnancy test to show up?

Pregnancy test sticks generally detect whether the first urine in the morning contains a certain amount of HCG. If the HCG set value of the pregnancy test stick is reached, two bars will appear on the pregnancy test stick, indicating pregnancy.

Since HCG is actually secreted in large quantities in urine after the fertilized egg implants, and it takes at least 11 days for the fertilized egg to implant, it is generally necessary to wait until 11 days after ovulation to use a pregnancy test stick to detect pregnancy.

Although pregnancy test sticks can detect whether you are pregnant, the editor still wants to give some tips to female friends who need to take pregnancy tests to improve the accuracy of pregnancy test sticks. First, try to use the first urine in the morning for testing, because hormone levels are easiest to detect at this time. Do not drink too much water to increase urine production, as this will dilute hormone levels. Some medications may affect the results of the test, so be sure to read the label instructions carefully.