Can you measure pregnancy after 7 days in the same room?

7 days in the same room basically can not detect pregnancy, even if it is difficult to detect the results of blood tests pregnant. Because in the clinical fertilized eggs only into the uterine implantation, only after the blood HCG test can detect positive results. In addition, implantation a few days after the urine HCG detection positive results. Fertilized eggs from the sperm and eggs from the moment of combination to enter the uterine implantation, at least after about 9-13 days to implantation, so the first 7 days of the same room can not be detected. It is recommended that half a month after the same room can be blood for laboratory tests, if you want to use morning urine for examination, it is recommended that 15-20 days after the same room time to detect.