How Do Muscles Grow? A Seminal Review

Over ten years ago, a comprehensive literature review explained the science and theories behind muscle growth. Since then, current scientific understandings have changed how we think about muscle growth.
The Mechanisms to Muscle Hypertrophy and Their Application to Resistance Training. Schoenfeld (2010)

Low Testosterone: Causes, Symptoms, Diagnosis, and Treatment

Supersets: A Tool to Balance Efficiency and Volume

Reps vs Load for Hypertrophy

The return of very high volume training?!

Overview of Research

Exercise metabolism and adaptation in skeletal muscle

Lesson Explainer: Male Genital System

PDF) High body mass index has a deleterious effect on semen

Testosterone therapy: Potential benefits and risks as you age