Hormone replacement therapy is a method of treatment that
involves replacement or substitution of naturally occurring hormones. It is
used in instances where there are deficiencies of certain hormones. Examples of
commonly used methods of hormone replacement therapy are post menopausal
hormone replacement therapy, hormone replacement for transgender gender variant
and transsexuals, and androgen replacement therapy. Out of these, post
menopausal hormone replacement therapy is the most widely used and well known
type of hormone replacement therapy.