The vaginal virome in IVF patients at the time of embryo transfer. The viruses detected in each sample are shown. Each patient is represented in a row. Each virus detected is indicated in a column. The dark bars indicate the presence of the virus in the sample. Samples are grouped according to whether clinical pregnancy was achieved and according to whether they were included in the prophylactic azithromycin or no azithromycin groups of the study. HSV, herpes simplex virus. EBV, Epstein Barr virus. HHV, human herpes virus. MCPy, Merkel cell polyomavirus. HPV, human papillomavirus.