Older mums have natural protection against endometrial cancer

Women who wait to have a baby until they’re into their 30s are far less likely to develop endometrial cancer.  And the risk gets lower the longer you wait: women who last gave birth in their 40s nearly halved their chances of getting the cancer.
The protection lasts for years, and certainly until the woman is in her late 70s, and against both types of endometrial cancer: type 1 and the rare, and deadly, type 2.
Women who last gave birth aged between 30 and 34 reduced their risk of the cancer by 17 per cent compared to a woman who last gave birth when she was 25.  The risk reduces again, to 32 per cent, in women who gave birth between the ages of 35 and 39, and to 44 per cent if the woman gave birth in her 40s.
Researchers at Keck School of Medicine at University of Southern California discovered the natural protection of childbearing when they examined 8,671 cases of endometrial cancer and compared them against 16,562 healthy controls.
(Source: University of Southern California website).