@article{Ayoola2010,
author = {Ayoola, A.B. and Nettleman, M.D. and Stommel, M. and Canady, R.B.},
title= {Time of pregnancy recognition and prenatal care use: A population-based study in the United States},
year = {2010},
doi = {10.1111/j.1523-536X.2009.00376.x},
volume = {37},
number = {1},
pages = {37--43},
}