Pros: 1. 1 in 250 women have their lives saved by mammograms. 2. Regular mammograms increases the chance of capturing the cancer in an early stage of development, making treatment easier. Cons: 1. 1 in 3 women get false positive readings (meaning that the mammogram says they have cancer, when they really do not). 2. Since cancers in younger women grow more quickly than in older women, having a mammogram once a year is not likely to catch the breast cancer in an early enough stage to improve chances of survival. Plus, younger women have a higher risk of false positive readings.