Scientists from Belgium, Denmark, Egypt, Greece, Italy and the US collaborated on a literature review of 14 past studies involving 1,244 breast cancer patients. They found that women who conceived a child after cancer diagnosis were 41% less likely to die than those who did not become pregnant. Survival was most common in women with a history of node-negative disease. No significant differences were found in the outcomes of women with a history of breast cancer who became pregnant and those who did not and were known to be free of relapse.