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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.
The more sensitive tests may be able to detect low levels of hCG as early as four days before your period is due, which is usually about seven days after youâve conceived. The sensitivity of a pregnancy test is described on the packaging as mIU/ml (milli-international unit per millilitre). In general, pregnancy tests range in sensitivity from 10mIU/ml to 40 mlU/ml. The lower the number, the more sensitive the test, and the earlier it can detect pregnancy. Every pregnancy is different, though. If you test too soon, even with a sensitive test, the amount of hCG in your urine may not be high enough to detect. Getting a false negative, when a test that says youâre not pregnant and you are, can be upsetting and confusing.