Estrogen
Estrogen dominance:
This is caused when you don't have enough progesterone to balance the effects of estrogen. Thus, you can have low estrogen but if you have even lower progesterone, you can have symptoms of estrogen dominance. Many women between the ages of 40 and 50 suffer from estrogen dominance. This topic is covered in much detail in Dr. Lee's timeless book,
What Your Doctor May Not Tell You About Menopause