@article{Lang2012,
author = {Lang, K. and Nuevo-Chiquero, A.},
title= {Trends in self-reported spontaneous abortions: 1970–2000},
year = {2012},
doi = {10.1007/s13524-012-0113-0},
volume = {49},
number = {3},
pages = {989--1009},
}