1. Loghi M, Crialesi R, editors. La salute riproduttiva della donna. Roma: Istituto Nazionale di Statistica; 2017.
2. Sabbadini L. Gravidanza e parto. Roma Istat. 2001;12.
3. Sobotka T. Post-transitional fertility: childbearing postponement and the shift to low and unstable fertility levels. Vienna: Vienna Institute of Demography Working Papers 01/2017; 2017.
4. Shan D, Qiu PY, Wu YX, Chen Q, Li AL, Ramadoss S, et al. Pregnancy outcomes in women of advanced maternal age: a retrospective cohort study from China. Sci Rep. 2018;8:12239.
5. Hamilton BE, Martin JA, Osterman MJK, Curtin SC, Matthews TJ. Births: final data for 2014. Natl Vital Stat Rep. 2015;64:1–64.