Perimenopause, also called the menopausal transition, is the natural shift in a woman’s reproductive cycle toward menopause, or ceasing of the cycle. When a woman has gone through 12 consecutive months without a menstrual period, she is considered to have reached menopause, and the perimenopause period is over.
Menopause is the transitional phase of a woman’s life when menstrual function ceases, which typically spans a 2-5 year period. During this time, hormonal levels in the body are fluctuating, as estrogen and progesterone levels gradually decline and the body responds by producing higher than normal levels of follicle stimulating hormone (FSH) and luteinizing hormone (LH). The main symptoms likely to be experienced (with varying degrees of severity) are headaches, tiredness, lethargy, irritability, anxiety, nervousness, depression, insomnia, inability to concentrate, hot flashes, and sweating.