The second carbon is connected to the amino group. Amino means there is an NH 2 group bonded to the carbon atom. In the image, you see a + and a -. Those positive and negative signs are there because, in amino acids, one hydrogen atom moves to the other end of the molecule. An extra H gives you a positive charge.
Ranges of normal estrogen levels are measured in parts pg/ml of estradiol. In normal reproductive age women, during the menstrual cycle, estradiol levels range from 50-400 pg/ml. The actual normal level of estrogen varies during different parts of the menstrual cycle. In menopause, the general range may be 10-20 pg/ml.
Generally, the levels are measured on the third day of the menstrual cycle. High level is noticed in women who are in post-menopausal phase. The normal FSH level after menopause is 50-100 mIU/ml. A level more than 12 mIU/ml makes the ovaries weak, whereas a level above 25 mIU/ml leads to ovarian failure.This is what happens after menopause.igh FSH is therefore considered as normal in women post menopause. The levels higher than 25 mIU/ml suggest the beginning of premenopause phase, whereas the levels more than 50 mlU/ml indicate that the woman is in menopause.