Barber LE, et al. - Researchers evaluated a prospective cohort of 59,000 African American women in the Black Women’s Health Study to determine the link between pre- or perinatal factors and breast cancer risk among African American women. Information on birth weight, preterm birth, twin or triplet status, maternal age at birth, birth order, and breastfeeding status during infancy (yes or no) was provided by the participants during follow-up from 1997-2015. Researchers noted an increased risk of breast cancer among African American women with a low or high birth weight or born to older mothers. Trends towards delayed child birth and higher birth weights, coupled with disproportionately high rates of low birth weight, were suggested to be the possible contributors to increases in breast cancer incidence.