You need more than just testes to make a penis
- Written by Mark Green, Merck Serono Senior Lecturer in Reproductive Biology, University of Melbourne
Testosterone is primarily made in the testes, and creates many of the characteristics we see in adult men. from www.shutterstock.com
In prenatal ultrasounds or at delivery, many new parents look between their baby’s legs: the presence of a penis is taken as a strong sign that it’s a boy.
For humans and other animals, development of a...