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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.
HCG is usually detectable in the blood serum, usually 8 days after conception, of approximately 5 percent of women who are pregnant. Virtually, the rest 95 % of the women will experience its detection at about 11 days after conception. HCG levels rises progressively immediately after conception. The levels double every 30.9 hours on average until they reach 6500 mIU/ml at around the 8th week after your last menstrual period (LMP). After this, the rate of increase is individualized and peaks between 60th and 70th day of last menstrual period.