@article{McDonald2011,
author = {McDonald, J.W. and Rosina, A. and Rizzi, E. and Colombo, B.},
title= {Age and fertility: Can women wait until their early thirties to try for a first birth?},
year = {2011},
doi = {10.1017/S002193201100040X},
journal = {Journal of Biosocial Science},
volume = {43},
number = {6},
pages = {685--700},
}