Vaginal Lubrication: Vaginal Dryness, Vaginal Health, and More Why you should use a vaginal moisturizer during your period VAGINA The vagina serves as the inferior region of the birth canal. It also serves as the passage way for the sloughed endometrium that results from menstruation and is the receptacle for Anatomy and Physiology of the Female Reproductive System Anatomy and Physiology II Why you should use a vaginal moisturizer during your period