The researchers are from the Public Health Institute of Berkeley in California.
Dr. Barbara Cohn, researcher at the Public Health Institute in Berkeley, California and co-author of the study, explained that she and her colleagues were intrigued by past studies that had linked the common insecticide with breast cancer. So, they started a study on humans to back the idea, “This 54-year study is the first to provide direct evidence that chemical exposures for pregnant women may have lifelong consequences for their daughters’ breast cancer risk.”
Researchers have recently established a link between pre-birth exposure of DDT years ago and the increased risk of breast cancer among older women.
For the study, the team of researchers relied on the data provided by Health Plan of Kaiser Foundation. Based on the list, there were at least 20,000 pregnancies from the late 1950s toward the late 1960s. Almost half of the pregnancies, meanwhile, resulted to daughters.
Researchers to establish the connection between pesticide and the increased risk of breast cancer; they looked the levels of DDT in the blood samples of mothers. These samples were obtained either after the delivery or while the babied were still in the womb.
Researchers determined that some of these daughters later developed breast cancer by the time they were already in their fifties. To know if it may has something to do with DDT exposure; they have obtained another round of blood samples from mothers with daughters suffering from the cancer. They also compared the levels to those who didn’t have the cancer.
The team found that the risk of breast cancer is higher among women who had exposed to DDT while still in the womb than those who weren’t.
Researchers wanted to make it clear that the study doesn’t establish cause and effect; they still want to determine whether the same pattern still hold in succeeding generations.
The findings of the study are published in the Journal of Clinical Endocrinology & Metabolism.