7Hein M,Petersen AC,Helmig RB,et al.Immumoglobulin levels and phagocytes in the cervical mucus plug at term of pregnancy[J].Acta Obstet Gynecol Scand,2005,84(8):734.
10Pybus V, Onderdonk AB. Microbial interactions in the vaginal ecosystem, with emphasis on the pathogenesis of bacterial vaginosis. Microbes Infect, 1999, 1:285
