People with male reproductive anatomy usually have two ... which is a male sex hormone. These egg-shaped organs are located in the scrotum, below the penis. The average testicle size is 4-5 ...

Sex is widely understood to refer to a label assigned at birth ... with the development of female reproductive organs and XY chromosomes with male reproductive organs. But “sex chromosomes ...

Most girls begin puberty between ages 8 and 14, with an average of 11. Girls develop more quickly than boys and most finish puberty within four years. Most boys begin puberty between ages 9 and 14 ...