... University of Caxias do Sul, and of the Editorial and Scientific Board of the GeneralHospital of Caxias do Sul, and did not present a conflict of interest. The Letter of Free and Informed Consent and the ... the qualification and quantification of DNA for HPV analysis, and by thePGM09 and PGMY11 oligonucleotides, which amplify asegment of 450 pb of a preserved region of gene L1 of Human Papillomavirus[27]. ... con-vincingly documented, and of contamination of placentalcells by oocyte infection before or right after implanta-tion, by ascending infection or by infection carried by sperm containing latent...