“What we found from looking at up to 44 years’ worth of data was that having ever used the pill, women are less likely to get colorectal, endometrial and ovarian cancer.
“So, the protective benefits from using the pill during their reproductive years are lasting for at least 30 years after women have stopped using the pill.”
Dr Iversen added: “We were also interested in what the overall balance of all types of cancer is amongst women who have used the pill as they enter the later stages of their life.
“We did not find any evidence of new cancer risks appearing later in life as women get older.
“These results from the longest-running study in the world into oral contraceptive use are reassuring.
“Specifically, pill users don’t have an overall increased risk of cancer over their lifetime and that the protective effects of some specific cancers last for at least 30 years.”
These latest findings were published in the American Journal of Obstetrics and Gynaecology.