Associations between reproductive factors and biliary tract cancers in women from the Biliary Tract Cancers Pooling Project

•We pooled data from 19 longitudinal studies to estimate the associations between female reproductive factors and BTC. •The risk of GBC was increased with increasing number of live births in all women. •The risk of GBC, IHBDC, and EHBDC were increased with later age of menarche among women from Asian countries only. •Age of menopause was not associated with an increased risk of any BTC. Background & Aims Gallbladder cancer (GBC) is known to have...