Kazan medical journalKazan medical journal0368-48142587-9359Eco-Vector5908010.17816/kazmj59080Research ArticlePostterm pregnancyVoroninK. V.info@eco-vector.comManenkovP. V.info@eco-vector.com2803196748275792301202123012021Copyright © 2021, Voronin K.V., Manenkov P.V.2021<p>Postterm pregnancy is the leading cause of perinatal infant mortality. It occurs relatively often - from 2 [7, 26, 46) to 24% [19, 34, 38, 43], and more often in primiparous [20, 34, 40].</p>Kazan Medical archiveКазанский медицинский архив