Used primarily in the metric system, this prefix denotes a factor of 10â9 or 0.000000001. It is frequently encountered in science and electronics for prefixing units of time and length, such as 29 nanoseconds, 100 nanometres or in the case of electrical capacitance, 100 nanofarads.ano- (pref.). A prefix meaning one-billionth; as, a nanogram is one-thousandth of a microgram. nano- (pref.). Very small; submicroscopic; -- used to designate sizes smaller than those that would be referred to as micro-; as, nanoscale manipulations.
The normal range of estrogen varies depending upon the patient's age. Typically a women aged 20 to 29 will have an average level of 149 pg/ml (pictograms per milliliter). A female aged 30 to 39 will average a level of 210 pg/ml.
Normal FSH levels in women are in a range of 5 to 25 mIU/ml. If they are more than 25 but less than 50, one is said to be in a perimenopausal phase. Menopausal women have FSH levels over 50 mIU/ml. Thus, the levels of FSH are highly indicative of how far one is from the impending menopause.