Development of the human body is the process of growth to maturity. The process begins with fertilization, where an egg released from the ovary of a female is penetrated by a sperm cell from a male. T
Sperm fertilizing an egg
Views of a Foetus in the Womb detail
Tanner scale
Videos
The Tanner scale is a scale of physical development as pre-pubescent children transition into adolescence, and then adulthood. The scale defines physical measurements of development based on external
The five stages of pubic hair and breast growth, on a female subject