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.
The difference between the two tests is when they can detect hCG. Blood testing can detect hCG about eight to ten days after ovulation and in most cases urine testing (home pregnancy tests) detect hCG about two weeks after ovulation. The level of hCG is measured with a blood test known as a quantitative test, usually called a âquant betaâ by doctors.