How long does menopause last in female humans?

Answer 1

Post menopause begins a year after a woman's last menstrual period ends. It lasts the rest of her life unless she undergoes hormonal treatments to induce a menstrual cycle.

Answer 2

Typically 10 years. But there are a lot of variances. Some women go into full blown menopause induced by chemo, and some slide into it gradually like puberty.