Experts from the University of Liverpool John Moores explained why women develop menopause. One theory is that this condition is inherent in the female body in the evolution process. Menopause is the human reaction to high life expectancy. If ancient people lived not more than 30 or 40 years, now the average life expectancy in developed countries has passed the bar in 70-80 years.
There is another theory. Biologists have analyzed the existence of 26 kinds of mammals. It turns out that many of the animals in old age begin to care for other people's children. The same thing happens in humans. That is why most grandmothers love to keep and raise their own grandchildren.