Is human fecundity changing? A discussion of research and data gaps precluding us from having an answer

Melissa M Smarr, Katherine J Sapra, Alison Gemmill, Linda G Kahn, Lauren A Wise, Courtney D Lynch, Pam Factor-Litvak, Sunni L Mumford, Niels E Skakkebaek, Rémy Slama, Danelle T Lobdell, Joseph B Stanford, Tina Kold Jensen, Elizabeth Heger Boyle, Michael L Eisenberg, Paul J Turek, Rajeshwari Sundaram, Marie E Thoma, Germaine M Buck Louis