%0 Journal Article
%U https://doi.org/10.1515/jpm-2017-0014
%T Risk of preterm birth by maternal age at first and second pregnancy and race/ethnicity
%B 
%A Rebecca J. Baer
%A Juan Yang
%A Vincenzo Berghella
%A Christina D. Chambers
%A Tumaini R. Coker
%A Miriam Kuppermann
%A Scott P. Oltman
%A Larry Rand
%A Kelli K. Ryckman
%A Louis J. Muglia
%A Paul J. Chung
%A Laura L. Jelliffe-Pawlowski
%D 2018
%J Journal of Perinatal Medicine
%V 46
%N 5
%P 539-546
%R doi:10.1515/jpm-2017-0014
%[ 2026-05-06