Normal Levels. 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. And those over 40 but not in menopause will have an average level of 152 pg/ml.strogen is a female hormone that is mainly produced by the ovaries. It serves many purposes including helping to regulate the menstrual cycle, preserving bone density and increasing uterine growth. An imbalance in estrogen levels can cause many problems and symptoms.