This is the cervix of a 23 year old woman gave birth vaginally two years ago. She typically has a 30 day cycle and has no history of STIs.
Her cervix tore during the birth of her large baby and required sutures postpartum. You can see the irregular (not doughnut-shaped) shape of her cervix in the photo. After birth, she also experienced a partially prolapsed uterus which was corrected with a Laparoscopic Sacral Colpohysteropexy procedure. Her doctors advise a planned cesarean section for future births due to concerns of incompetent cervix and causing further trauma.