Can pregnancy be detected ten days after the same room?

10 days after cohabitation may not be able to detect pregnancy. Early detection of pregnancy is normal HCG elevation, HCG is secreted by trophoblast cells of placenta, in non-pregnant state, HCG content in female body is very small, only after pregnancy will be greatly increased, HCG elevation can be detected through blood and urine. In the process of cohabitation to HCG elevation, sperm movement, sperm and egg combination, fertilized egg implantation and other processes. If a woman is in the same room, just in ovulation and normal pregnancy, then ten days may be detected by elevated HCG in the blood, but when detected with early pregnancy test paper, it may only be weakly positive, and it will take some time to turn strong positive.