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.
Luteal phase: Levels fall. Menses: Estradiol levels range from 50-100 pg/mL. Analysis of estradiol levels may aid in establishing time of ovulation and optimal time for conception, which is 48-72 hours after estradiol levels peak at midcycle.ormone replacement. The goal of estrogen replacement in women of reproductive age is to replicate natural estrogen levels as closely as possible. Estradiol levels should be within the premenopausal reference range (and ideally higher than estrone levels), and LH/FSH levels should be within the reference range.