Women are ruled by their two main hormones: progesterone and oestrogen, but with the rise of synthetic hormones in the Pill, Coil and HRT do you know the difference why you need bio-identical hormones and not their chemical equivalents?
If HRT is stopped suddenly the oestrogen levels will quickly drop to very low levels. This may not produce any symptoms at all, but in many women it causes most of the symptoms associated with the menopause to appear.