Can I detect pregnancy on day 4?

It is impossible to detect it in four days because this period of time is relatively short. If you want to detect it, you need to wait until about ten days into the pregnancy. Only then can you detect it. You can test it through an early pregnancy test and then go to the hospital for further blood tests. This type of test is more accurate. Pregnancy can usually be detected in about 11 days using early pregnancy test strips. You must learn how to use the early pregnancy test strips correctly.

Can I detect pregnancy on day 4?

If pregnancy cannot be detected on the fourth day, the test strips from regular manufacturers are generally more accurate. Sperm can reach the woman's fallopian tube within 24 hours after intercourse, and combine with the egg released by the woman in the fallopian tube to form a fertilized egg. Pushed by the cilia in the fallopian tube, the fertilized egg will reach the uterus after about 6 to 7 days; if conditions are right, it will implant in the endometrium. Implantation of the fertilized egg is a sign that a woman is pregnant. That is, it usually takes about 8 days from intercourse to pregnancy. After 3 days of pregnancy (roughly equivalent to the 11th day after intercourse), the use of early pregnancy test strips can accurately show the pregnancy result.

Early pregnancy test strips are products designed to help women detect whether they are pregnant. Early pregnancy test: drop urine into the detection hole on the test paper. If a colored band appears in the control area of ​​the test paper, it indicates a negative result, indicating that you are not pregnant. On the contrary, if a clear colored band appears in the detection area, it indicates a positive result, indicating that you are pregnant. Early pregnancy test strips can only be used as a preliminary screening test, and false positives or false negatives may occur.

The detection reagent uses the principle of immunochromatographic double antibody sandwich method to make HCG detection test strips, which can measure HCG in urine samples within 3 minutes. During the test, when the urine sample is siphoned through the colloidal gold-labeled antibody, an antigen-antibody colloidal gold complex is formed. The complex continues to crawl and passes through the coated anti-HCGα subunit Mcab to form a double antibody sandwich colloidal gold complex, which appears as a color band at the coating line. The excess colloidal gold antibody continues to crawl and forms a colloidal gold immune complex with the sheep anti-mouse control line, which appears as a color band.

Human chorionic gonadotropin (HCG) is a glycoprotein hormone produced in the body of pregnant women and exists in large quantities in the blood and urine of pregnant women. HCG begins to be secreted on the 6th day after the egg is fertilized and can usually be detected after 11 days. In early pregnancy, the secretion of HCG increases rapidly, doubling in about 1.7-2 days, while HCG cannot be detected in the urine of normal non-pregnant women. Therefore, detecting HCG in urine is a reliable indicator for determining pregnancy. If you are newly pregnant, it is more accurate to use morning urine. Generally, a check-up two weeks later can confirm whether you are pregnant. After the sperm and egg meet, it can be shown in the HCG in the blood. So afterwards, just go to the obstetrics and gynecology department of the hospital to check a blood HCG test.

Therefore, a blood HCG pregnancy test can be performed about 9-11 days after having sex during the ovulation period to confirm whether you are pregnant. Generally, an early pregnancy test can be used to detect whether you are pregnant one week after your period is delayed. A pregnancy test or B-ultrasound examination 35 days after conception can confirm whether you are pregnant. Unexpected pregnancy brings a lot of troubles to many women, especially if the pregnancy is not discovered in time, the best time to terminate the pregnancy may be missed, which will cause certain harm to women's health. The emergence of early pregnancy tests has largely solved this problem.