Stobnicka, Dominika, Grażyna Jolanta Iwanowicz-Palus, Magdalena Korżyńska-Piętas, Katarzyna Dziaduszek, and Dorota Świst. 2018. “Pregnancy After the Age of 35 As a Pregnancy of High Obstetric Risk – the Demand for Education”. Journal of Education, Health and Sport 8 (4):44-58. https://apcz.umk.pl/JEHS/article/view/5403.