Use maternal birth year to flag possible data errors. Per Eijkemans et al 2014, practically 100% of moms are done giving birth by age 50.
https://academic.oup.com/humrep/article/29/6/1304/625687
Marinus J.C. Eijkemans, Frans van Poppel, Dik F. Habbema, Ken R. Smith, Henri Leridon, Egbert R. te Velde, Too old to have children? Lessons from natural fertility populations, Human Reproduction, Volume 29, Issue 6, June 2014, Pages 1304–1312, https://doi.org/10.1093/humrep/deu056
Use maternal birth year to flag possible data errors. Per Eijkemans et al 2014, practically 100% of moms are done giving birth by age 50.
https://academic.oup.com/humrep/article/29/6/1304/625687
Marinus J.C. Eijkemans, Frans van Poppel, Dik F. Habbema, Ken R. Smith, Henri Leridon, Egbert R. te Velde, Too old to have children? Lessons from natural fertility populations, Human Reproduction, Volume 29, Issue 6, June 2014, Pages 1304–1312, https://doi.org/10.1093/humrep/deu056