How many days after sperm implantation can it be detected with test paper

Creating a healthy baby can be said to be the greatest wish in the hearts of every parent. For some young parents, although they don’t know what pregnancy is like, after deciding to have a baby, both of them are eagerly waiting for the arrival of the baby. So, how many days after sperm implantation can pregnancy be detected using pregnancy test paper?

Embryo implantation time: within 9-11 days of ovulation

After the embryo implants, the surface trophoblast cells where the sperm and egg combine produce a protease that dissolves the uterine wall in contact with it. The fertilized egg is buried in the functional layer of the uterine wall. At this time, the transformed trophoblast cells will grow and extend many cell protrusions, forming a uniform villus shape, which is called villi. Therefore, the growth hormone it metabolizes has a very strange name - human chorionic gonadotropin (HCG). Without the implantation of the embryo resulting from the fusion of sperm and egg, this type of hormone will not be produced. Now, we can more accurately calculate how many days after AA it is necessary to detect the presence of this growth hormone.

After intercourse, it takes 4-5 days for the fallopian tubes to reach the uterus and 3-4 days to stay in the uterine body. The whole process takes a total of 7-9 days. Therefore, if you use a more sensitive (15 international units) early pregnancy test kit, it should be about 10 days after ovulation. It is very normal and effective to use a regular early pregnancy test strip (25 international units) to measure HCG around 15 days after ovulation.

The principle of self-testing pregnancy in the early stages of pregnancy is to test the HCG value, which is the value of human chorionic gonadotropin in the body. This type of hormone is produced by the embryo and usually appears in the urine a few days after pregnancy. However, due to the small amount, it is not easy to test it at the beginning. It will not become obvious until 10 to 14 days. Although many early pregnancy test strips indicate that women can take a pregnancy test one day after missing their normal menstrual period, in fact, not all pregnant women excrete the same rate and amount of HCG hormone, which varies from person to person. If you do a urine test too early, a negative result may be incorrect. Therefore, the best time to do an early pregnancy test is half a month after your menstrual period, so that the result will be more accurate.

Pregnancy can be detected 18 days after intercourse or if menstruation is delayed by 7-10 days. After the fusion of sperm and egg, the embryo implants in the uterine wall 6-8 days later, and HCG secreted by the embryo can enter the urine 7-10 days later. The sum of the two is the scientific method to test whether the pregnancy is confirmed by urine 18 days after intercourse. Pregnancy can be detected within the first seven days of sexual intercourse, usually around fourteen days, and rarely more than twenty days. You can buy pregnancy test strips yourself or have an HCG test at the hospital.