What is the 'Arithmetic Mean' The arithmetic mean is a mathematical representation of the typical value of a series of numbers, computed as the sum of all the numbers in the series divided by the count of all numbers in the series. The arithmetic mean is sometimes referred to as the average or simply as the mean. Some mathematicians and scientists prefer to use the term arithmetic mean to distinguish it from other measures of averaging, such as the geometric mean and the harmonic mean.
HCG can be detected in urine or blood after implantation, which occurs on average 9 daye (range 6-12 days) after fertilization. Some home pregnancy tests claim to detect hCG as early as 4 days before the next expected period.
In normal pregnancy, hCG can be detected as early as 6 days following conception with concentrations doubling every 32 to 48 hours.Levels at 25 mIU/mL of hCG (clinically significant pregnancy level) are reportedly present in serum and urin...or most women, it may be possible to determine whether you are pregnant as early as 7-10 days after conception. [ Source: http://www.chacha.com/question/how-soon-after-conception-can-pregnancy-be-detected ]. More Answers to  How soon after conception can pregnancy be detected .