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.
This hormone is released after the fertilized egg attaches itself to the wall of your uterus, while its amounts increase as the pregnancy progresses. How soon a pregnancy test will be able to detect this hormone depends on its sensitivity because some are able to detect HCG only when released in large enough amounts. As a result, a pregnancy test that is not able to detect small amounts of HCG will give you a negative result if you take it too soon.