How long does it take to do a blood test for pregnancy?

When women want to know whether they are pregnant, there are some testing methods. The most common method for women to test at home is test strips. The test strips have a high success rate in detecting whether women are pregnant, so you can choose the test strips with confidence. Blood tests for pregnancy are also very good, but this method requires going to the hospital. After the woman has tested at home, if she is pregnant, she also needs to go to the hospital for examination.

How long does it take to do a blood test for pregnancy?

You can do a blood HCG test about 10 days after sexual intercourse. hCG stands for human chorionic gonadotropin, which is composed of α and β dimers of glycoprotein. After a woman becomes pregnant, the hCG originally present in her blood and urine will fluctuate as the gestational age increases. Therefore, whether a woman is pregnant can be determined based on the changes in hCG.

The human chorionic gonadotropin (hCG) test is currently the most advanced pregnancy test. Common test methods include blood hCG test and urine hCG test. This test determines whether a woman is pregnant by checking the presence of β-subunits in the blood and urine.

The hCG blood test can be done 8-10 days after sexual intercourse, which is earlier than the 35-day test required by ordinary early pregnancy test strips to qualitatively detect urine. Therefore, the hCG blood pregnancy test can help you take appropriate countermeasures for pregnancy earlier. Functions of hCG:

1. It has the functions of FSH and LH, maintains the life of the menstrual corpus luteum, and enlarges the menstrual corpus luteum into the corpus luteum of pregnancy;

2. Promote the aromatization of androgens into estrogen and stimulate the formation of progesterone;

3. Inhibit the stimulation of plant lectins on lymphocytes. Human chorionic gonadotropin can be adsorbed on the surface of trophoblast cells to prevent embryonic trophoblast cells from being attacked by maternal lymphocytes;

4. It has LH-like function. Before the fetal pituitary gland secretes LH, it stimulates the fetal testicles to secrete testosterone to promote male sexual differentiation. It can also promote gonadal development, stimulate the activity of interstitial cells in the testicles in men, and increase the secretion of androgen (testosterone). It is of great significance for the treatment of male patients with combined pituitary deficiency. It can not only promote gonadal development and the secretion of male hormones, but also promote the development of secondary sexual characteristics.

5. It can bind to the TSH receptor of maternal thyroid cells and stimulate thyroid activity.

After understanding how long it takes to test for pregnancy through blood drawing, women need to actively cooperate when doing so. Before the blood drawing, women need to be on an empty stomach and cannot eat anything, so that it will not affect the test results. At the same time, women need to rest after the blood drawing to avoid dizziness.