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.
With the onset of puberty, levels rise gradually through the teen years to as high as 1,000 ng/dL. Normal adult values range from 250 to 1,100 ng/dL, with an individualâs testosterone level dropping slowly within this range beginning sometime after age 30.Different laboratories may have slightly different normal values depending on the test method used.ormal adult values range from 250 to 1,100 ng/dL, with an individualâs testosterone level dropping slowly within this range beginning sometime after age 30. Different laboratories may have slightly different normal values depending on the test method used.