Turkish researchers say they've proven the connection between abortion and an increased risk of developing cancer --also known as the ABC (abortion-breast cancer) link.
After surveying 1,500 women, researchers at the Istanbul Medical Faculty at Istanbul University and Magee-Women's Hospital in Pittsburgh found that those who had an abortion increased their chances of getting breast cancer by 66 percent.
The study also revealed the strongest risk factor for breast cancer was from induced abortions.
The results go against claims from groups like Planned Parenthood that there is no such abortion breast cancer link.
Joel Brind, head of the Breast Cancer Prevention Institute in the U.S., says previous studies have underestimated cancer risks associated with abortions.
He added that the breast cancer risk the doctors found in Turkey is likely higher than they reported, because only hospital or clinic patients were selected as study subjects-- rather than representatives from the general population.
The findings are published in the April 2009 issue of the World Journal of Surgical Oncology.