This is a very frequent question. There are several circumstances by which a woman may have lost an ovary. One of them is because he had a cyst that, due to its size or characteristics, required the complete removal of the ovary.
As it is known, when a woman is born the ovaries have an approximate number of 2 million eggs and that after birth no new eggs are produced. On the contrary, from birth it begins to lose an average of a thousand eggs each month, until one day they run out and the ovary stops working. This is called menopause. It usually occurs around age 50.
Losing an ovary is then losing half of the ovarian reserve and this could mean that menopause occurred earlier and that you had fewer eggs to achieve pregnancy. Fortunately, this is not strictly so. A woman actually spends only about 400 eggs during her reproductive life and a single ovary can compensate and provide enough for a woman’s entire reproductive life (from puberty to menopause) and to have as many children as she wants.
A word of caution though. The circumstance that led to the loss of the ovary could be repeated (endometriosis, cysts, etc.) more likely if it has already happened once and could jeopardize the integrity of the second ovary and future fertility.
For this reason, women with only one ovary should be very responsible with their periodic gynecological check-up and weigh the convenience of not postponing their motherhood too much.