Zhabchenko, I.A., and S.N. Zanko. 2020. “CERVICAL INSUFFICIENCY: CLASSIFICATION, ETIOPATHOGENESIS, DIAGNOSIS, METHODS OF PROPHYLAXIS AND CORRECTIONS (CLINICAL LECTURE)”. Reproductive Medicine, no. 1(42) (March), 35-47. https://doi.org/10.37800/rm2020-1-4.