Many single female friends will be more cautious in choosing contraceptive measures when having sex with their boyfriends. When menstruation is delayed, the biggest worry is that you might accidentally get pregnant. Do you feel anything on the third or fourth day of pregnancy? Can we check it out on the third or fourth day of pregnancy? Friends in need can come and find out. Do you feel anything when you are three or four days pregnant? The answer is no. It takes 7-8 days for the sperm and egg to combine into a sperm-egg combination, and for the sperm and egg to swim from the fallopian tubes to the uterus and embed into the pregnant mother. Only after embedding into the pregnant mother can it be called pregnancy. Therefore, it takes at least 7-8 days from fertilization to pregnancy, and no more than 9-10 days. If it exceeds 10 days, the progesterone is low, the estrogen withdraws, and the menstrual period comes. Therefore, pregnancy can be detected as early as 10 days after having sex. After a successful pregnancy, the female body will produce human chorionic gonadotropin (commonly known as HCG), which is a glycoprotein hormone that exists in large quantities in female blood and urine. HCG begins to be secreted after the 6th day after ovum fertilization. The secretion of HCG in early pregnancy increases rapidly, and this hormone cannot be detected in the urine of normal non-pregnant women. Therefore, checking HCG in urine is a reliable indicator for determining pregnancy. In the early stages of pregnancy, it is more accurate to test with morning urine. The principle of pregnancy test using pregnancy test strips is to test the HCG value, that is, the value of human chorionic gonadotropin in the body. This hormone is produced by the embryo, and the body begins to secrete human chorionic gonadotropin 10-14 days after conception. After metabolism, it first appears in the blood, and then appears in the urine along with the respiratory system. However, due to the small amount, it is not easy to test it at first, and it becomes increasingly obvious after 1-2 weeks of pregnancy. Neither too early nor too late will have good results. |
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