Can I detect pregnancy after 5 days of sex?

For women who are eager to have a baby, they all hope to get the good news as soon as possible. However, in fact, pregnancy cannot be detected immediately after intercourse. It takes some time for the embryo to implant. So, how can you know that you are pregnant? How many days during pregnancy can the test be detected? Let’s take a look together today.

01 At the 4th to 6th time after fertilization, the sperm and egg have not yet successfully implanted the embryo, but are floating and drifting in the uterus, fully absorbing nutrients and continuing to disintegrate until they become an embryo with a head and a tail. On the seventh day, healthy embryonic cells will produce a tail-like drill to drill into the mother's uterine lining, and later become the fetal umbilical cord that connects the mother's body to the uterus.

On the 7th to 10th day, the embryo finds a suitable position on the inner wall of the uterus. Then the small twist drill begins to pierce the mother's uterus and drill in (embryo implantation). At this time, some mothers usually feel a slight tingling sensation in the lower abdomen from time to time, and there are a few red blood stains on the underwear, which is the blood flowing from the punctured area. At this point the embryo begins to secrete HCG, a hormone that promotes growth, and secretes more and more as the embryo grows.

In the absence of pregnancy and under normal circumstances, the amount of HCG is very small, and the standard value detected by blood test is extremely low. However, after the embryo implants, the HCG content in the blood and urine will increase. Therefore, whether you are pregnant can be determined by testing the HCG content in the blood and urine.

02 Generally, pregnancy can be detected 7-10 days after intercourse. The longer the time, the more accurate it is.

This is because, after metabolism, HCG first enters the blood circulation and then enters the urine. If it is a blood test HCG, you can first detect whether you are pregnant about 7 days after intercourse, but if it is a urine HCG test, it usually takes at least 11 to 14 days after intercourse.

Blood HCG testing needs to be carried out in the hospital, and the results are more accurate and have a smaller deviation. Urine HCG is a self-test method using ovulation test strips or pregnancy test sticks, with a success rate of around 75%. If you see a doctor for a scientific urine HCG test, it will be more accurate.

03What should you pay attention to when checking HCG

The HCG blood test does not require fasting. It mainly determines whether a woman is pregnant by accurately measuring the HCG value in her blood.

Theoretically, HCG urine test can be done in urine at any time of the day, but the first urine in the morning is more accurate because the urine will be diluted after drinking plenty of water and eating during the day.

However, it should be emphasized that many non-pregnancy factors can cause positive urine HCG, such as blood in the urine, uterine ovarian tumors, or taking some fertility drugs, etc., or it may be stimulated by other hormones. Therefore, if you only use urine HCG with quantitative pregnancy test paper to test whether you are pregnant, it cannot be a complete diagnosis. If the urine test shows positive pregnancy type, in order to ensure the accuracy of the pregnancy, you should see a doctor immediately for blood tests and B-ultrasound examinations for further diagnosis!