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Generally from 6 Â½ -7 weeks is the time when a heartbeat can be detected and viability can be assessed. A normal heartbeat at 6-7 weeks would be 90-110 beats per minute.The presence of an embryonic heartbeat is an assuring sign of the health of the pregnancy.rogesterone. Progesterone levels also can have quite a variance at this stage of pregnancy. They can range from 9-47ng/ml in the first trimester, with an average of 12-20ng/ml in the first 5-6 weeks of pregnancy.
Many at-home pregnancy tests are sensitive enough to detect your pregnancy long before your missed period. However, the First Response at-home pregnancy test is the only one that can detect the hCG in your body at levels as low as 6.5 mIU/ml. It is also the only test that works six days early. Other tests work as early as five days, but they donât detect hCG levels this low. The First Response digital test is the most sensitive pregnancy test. The First Response pregnancy test is 99 percent accurate, but only if you use it the day you miss your period. Before that, the accuracy is lower.