Round ligament Broad ligament Cardinal ligament Uterosacral ligament Pubocervical ligament. The vagina has a thick layer outside and it is the opening where the fetus emerges during delivery. View our diagram of the male reproductive organs, including the penis, testicles, prostate, urethra. This is a vaginal infection in women. In addition, contractions in the Organs female reproductive system wall of the uterus are important in pushing out the fetus at the time of birth.