Figure 1. Histological and immunohistochemical features of the umbilical cord in women with Covid-19. A - Histological structure of the umbilical cord in uncomplicated pregnancy (A) and in women with Covid-19 (B) (staining with hematoxylin and eosin); Ax20; Bx40; A, B - staining with hematoxylin and eosin; C - I - Immunohistochemical study with primary antibodies to the N-protein of the SARS-CoV-2 virus, positively stained fibroblast-like cells of Wharton's jelly and macrophages (E); there is a pronounced edema of Warton's jelly, x400. G - Comparison group: umbilical cord samples from women with uncomplicated pregnancy, without Covid-19, x200. H - Negative control, x400. I, J - Villous tree of the placenta: I - weak staining in the membrane of syncytiotrophoblast and endothelium of placental villi; (in case of severe course of Covid-19 and the birth of a live child with a negative test for Covid-19); J-sample of placenta obtained from a woman with severe Covid-19 (positive control); Iх 200; Kх200.