@article{Eijkemans2014,
author = {Eijkemans, M.J.C. and Poppel, F. and Habbema, D.F. and Smith, K.R. and Leridon, H. and Velde, E.R.},
title= {Too old to have children? Lessons from natural fertility populations},
year = {2014},
doi = {10.1093/humrep/deu056},
volume = {29},
number = {6},
pages = {1304--1312},
}