(Natural News) Half of American women who undergo bilateral mastectomy after genetic testing for breast cancer do not carry cancer-causing genes at all, a study revealed. The number of women undergoing preventive mastectomy reached exponential proportions following Angelina Jolie’s highly-publicized decision to remove both of her breasts in 2013. According to health professionals, millions have already taken genetic testing. Surgeons have also noticed an uptick in women with newly-diagnosed breast cancer who proceed with mastectomy following genetic testing.