American Sexual
Health Association

Learn about Sexual and Reproductive Anatomy

A person looks at an anatomical diagram on a tablet

Sexual anatomy typically refers to the both the external sexual organs, like the vulva and penis, and the internal organs involved in reproduction, like the uterus and seminal vesicle. Learn about this part of the body and how it works.

Are penises getting longer?

Measuring penis length

Are penises getting longer? New research suggests the average penis length has increased over the last few decades. Does it matter?