Although, in principle, a woman could become pregnant until the end of her reproductive stage (with the arrival of menopause), the truth is that as a woman's age advances, the possibility of becoming a mother in a natural way becomes more and more difficult.
The reason is that the ovarian reserve (the number of eggs that still remain in the ovaries) is depleted and the quality of the eggs also decreases with time.
When a woman is 50 years old and is close to menopause (if this stage has not yet arrived) both aspects (quantity and quality of the eggs) are already very affected and achieving a natural pregnancy that reaches term would be really complicated. On the other hand, if menopause has already arrived, there would be no possibility of a natural pregnancy.
