Patterns of leisure-time physical activity across pregnancy and adverse pregnancy outcomes oleh Janet M. Catov, Corette B. Parker, Bethany Barone Gibbs, Carla M. Bann, Benjamin Carper, Robert M. Silver, Hyagriv N. Simhan, Samuel Parry, Judith H. Chung, David M. Haas, Ronald J. Wapner, George R. Saade, Brian M. Mercer, C. Noel Bairey-Merz, Philip Greenland, Deborah B. Ehrenthal, Shannon E. Barnes, Anthony L. Shanks, Uma M. Reddy, William A. Grobman, for the NICHD NuMoM2b and NHLBI NuMoM2b Heart Health Study Network