12 days in the same room can you detect pregnancy?

Under normal circumstances, pregnancy can be detected 12 days after coitus. After coitus occurs, it takes about 7-8 days for the fertilized egg to combine and complete implantation. The fertilized egg begins to secrete chorionic gonadotropin after implantation, commonly known as HCG. This hormone exists in the urine and blood of pregnant women. The longer the pregnancy time, the higher the content of this hormone. After coitus occurs, you can use the early pregnancy test paper to detect the HCG content in the morning urine at home. When showing two bars, that is pregnant. If showing a bar also do not worry, there may be fertilized eggs implantation time late, you can go to the hospital on an empty stomach to take blood tests HCG blood value, the doctor will judge whether pregnant.