Will you definitely get pregnant after having sex? This concept is clearly incorrect. The combination of sperm and egg also requires a chance, and successful conception sometimes has a certain element of luck. Pregnancy should not be rushed, it should be done slowly and tested slowly. So, having sex for 12 days is still negative. Let's take a look at some common knowledge related to conception below.
Same sex for 12 days, still negative
After 15 days of regular sexual activity, a test strip can be used for testing, and after one week, a blood HCG test can be performed to confirm pregnancy. Ovulation occurs around the 14th day of the menstrual cycle. Assuming successful fertilization at this time, it takes 6 to 7 days for the fertilized egg to produce HCG, and pregnancy tests are determined by measuring urine HCG. The true start of HCG secretion occurs after the implantation of the fertilized egg, when syncytiotrophoblasts begin to secrete HCG in large quantities. And the implantation of the fertilized egg takes at least 11 days. So, if you want to be more accurate, wait for 11 days at the earliest, which will be more accurate.
Sperm can survive for 2-3 days after entering the female vagina, and if ovulation occurs during this period, conception will occur. The lifespan of an egg is also about 2-3 days, while it takes 1 day for sperm to travel from the vagina to the fallopian tube, and 2 days for fertilized eggs to implant. So the time for conception after sexual intercourse should be 2+1=3 days. The calculation of pregnancy days in medicine generally starts from the first day after the last menstrual period. If it is a B-ultrasound examination, it can generally be seen within 25 to 38 days, but some women may not be able to see it until about 40 days after implantation due to late fertilization. So, the latest will not exceed 40 days.
Attention should be paid when using early pregnancy test strips
1. If the test paper you purchased is stored for too long (more than 1 year), or if the test paper is damp and not stored at normal room temperature (should not be refrigerated), it may become invalid and result in false negative test results.
2. If the pregnancy has just begun or there is a possibility of ectopic pregnancy (ectopic pregnancy), the sample with low HCG levels in the body should be left to stand for more than 3 minutes (usually only 1 minute) and carefully identified for weak positivity - the color band in the detection area only appears faintly.
3. In extreme cases, such as molar pregnancy, choriocarcinoma, and high levels of HCG in the body, urine tests may not show positive results.
The above is the relevant introduction about whether having sex for 12 days is still negative. The success of conception cannot be rushed. It is important to calculate the ovulation period and the survival time of the egg in order to increase the chances of successful conception. Good sexual positions can also be adopted to improve the chances of pregnancy. As long as both parties are in good health, they will definitely succeed.
