@article{van Noord-Zaadstra1991,
author = {van Noord-Zaadstra, B.M. and Looman, C.W. and Alsbach, H. and Habbema, J.D. and te Velde, E.R. and Karbaat, J.},
title= {Delaying childbearing: Effect of age on fecundity and outcome of pregnancy},
year = {1991},
doi = {10.1136/bmj.302.6789.1361},
volume = {302},
number = {6789},
pages = {1361--1365},
}