There has been a series of confusing studies over estrogen. Many menopausal women went off the drug when increased rates of breast cancer were found. However, recent findings are challenging this conventional wisdom as a "major government study has found that years after using estrogen-only therapy, certain women had a markedly reduced risk of breast cancer and heart attack," according to The New York Times. The key, says Tara Parker-Pope, reporter for The New York Times, is that these women were only on estrogen, and not progestin. She explains the findings and what this means for women.