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.
Most home pregnancy tests are sensitive enough to detect hCG in your urine on the first day your period is due. If you have a negative result when you first test, it may be that the amount of hCG has not yet reached a level where it can be detected. home pregnancy test detects the presence of the pregnancy hormone, human chorionic gonadotrophin (hCG), in your urine. Your body starts to produce hCG when a fertilised egg implants in your uterus (womb). HCG is secreted by the cells which will go on to form your baby's placenta.