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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.
Home pregnancy tests only check hCG levels and the hormone hCG is produced in pregnancy, which is released in a pregnant woman's urine. So, unless the woman has been given a medication that contains hCG (Profasi, Pregnyl, Novarel), then a positive HPT should indicate a new pregnancy.uman Chorionic Gonadotrophin-hCG The most common test used to detect a pregnancy in the very early weeks uses hCG.The hCG hormone starts to be released into the woman's blood stream soon after the baby implants into the lining of her uterus at about 8 to 12 days after conception.