This is a photo of a woman’s cervix from day two of her 28 day cycle. She has never been pregnant or had any STIs. You can see the darker red cells around her os called the squamocolumnar junction (border between the squamous epithelium of the ectocervix and the columnar epithelium of the endocervix). This is a normal pattern of cells that is visible on some women. Interestingly, no menstral blood is visible though this was the second day of her cycle.