Breast Cancer Screening Explained: Self Check and Mammogram Tips! Breast cancer screening is a preventive health check done in women who do not have any symptoms or visible signs of cancer. As per Indian guidelines, women at average risk should begin breast cancer screening after the age of 40 years. From this age onward, a screening X ray mammography is recommended once every year or once every eighteen months to detect cancer at an early and treatable stage. Women who have a higher risk due to