Hormone replacement therapy (HRT) is done when there is a lack of naturally produced hormones in the body. Due to this, the body has to face many types of problems. For example, the stage of menopause in women is one such condition when the main hormones of women are deficient.
It is defined as when there have been no menstrual periods for 12 consecutive months, and no other biological cause can be identified.
It is described as a physiological cessation of menses and the end of fertility.
Perimenopause is when there is a decline in ovarian function, and the woman experiences estrogen deficiency symptoms and possibly; irregular cycle.