Secondary sex characteristics are features which make it possible to tell the sexes of a species apart.

Data on fertility and the development of secondary sex characteristics is relatively sparse.

They are one of the most visible or obvious female secondary sex characteristics.

Testosterone helps the body develop and maintain male sex characteristics.

It helps the body develop and maintain female sex characteristics.

Many of these fall into the category of male secondary sex characteristics.

Changes in secondary sex characteristics include every change that is not directly related to sexual reproduction.

Virilization refers to the development of male sex characteristics in a female.

The features that distinguish the two sexes of a species are called secondary sex characteristics.