TY - JOUR A1 - Carson, C. A1 - Kelly, Y. A1 - Kurinczuk, J.J. A1 - Sacker, A. A1 - Redshaw, M. A1 - Quigley, M.A. T1 - Effect of pregnancy planning and fertility treatment on cognitive outcomes in children at ages 3 and 5: Longitudinal cohort study Y1 - 2011 DO - 10.1136/bmj.d4473 VL - 343 ER -