Can pregnancy be detected after 7 days in the same room?

Women in the same room seven days later, can go to the hospital for blood test HCG check whether there is pregnancy. But there is no guarantee that you can test out, because the time is relatively short, fertilized eggs may not be fully implanted, so the detection of HCG situation will be relatively poor. It is best to go to the hospital for blood test HCG check in the same room for ten days to fourteen days. At this time, the test results will be more accurate.