1. Obstetrics. National guide. Ed. Savel'eva GM, Sukhikh GT, Serov VN, Radzinskii VE. Moscow: GEOTAR-Media. 2015;238-242. (In Russ.)
2. Fedorova MV, Kalashnikova EP. Placenta and its role in pregnancy. Moscow: Meditsina Publ, 1986;256. (In Russ.)
3. Milovanov AP. Pathology of the mother-placenta-fetus system: a guide for physicians. Moscow: Meditsina, 1999;448. (In Russ.)
4. Posiseeva LV, Peretyatko LP, Kulida LV, Khamoshina MB. Placental factors of stillbirth: preventive possibilities. Rossiiskii vestnik akushera-ginekologa. 2014;14:5:83-86. (In Russ.)
5. Rachkova OV, Kuznetsov RA, Peretyatko LP. Morphological characteristics of the endometrium and chorionic villi in spontaneous abortion and normal pregnancy. Vrach-aspirant. 2011;2.3:45:463-469. (In Russ.)