How many days after conception can a pregnancy be detected through a blood test?

Pregnancy can usually be detected through a blood test around 10 to 15 days after sexual intercourse. Details are as follows: After pregnancy, the levels of various sex hormones such as human chorionic gonadotropin (hCG), estrogen, and progesterone gradually increase in the pregnant woman's body. Most pregnant women can detect pregnancy around 10 to 15 days after sexual intercourse by having a blood test to measure the levels of progesterone, hCG, and other sex hormones. If the test is conducted too early, the increase in the levels of various sex hormones in the pregnant woman's body may not be very significant, and the result of the pregnancy test through blood sampling may not be very high, which may affect the judgment of pregnancy. Therefore, pregnant women are advised to undergo a blood pregnancy test around 10 to 15 days after sexual intercourse, as this can mostly confirm the diagnosis of pregnancy. As the number of weeks of pregnancy increases and the fetus grows gradually, in the early stages of pregnancy, the hCG levels in the pregnant woman's body may double every other day, and progesterone levels will also increase significantly. If the increases in hCG and progesterone are not very significant or if they decrease, it may indicate pathological conditions such as threatened abortion or abortion, which require timely diagnosis and treatment.