Sex Education ( Pt.4 ) Hard by yael1995 More quizzes in Community What is the male hormone called? Cortisol Prolactin Oestradiol Testosterone What is the name of the female sex part in the outside part of the body? Hymen Vulva Labia Urethra What is the most common STI (Sexually Transmitted Infection) in the United States? Doing great! Continue in HICHAPP