In 1972, Carlos had a medical operation to change her body from male to female.

This way the male can protect his egg site and the female from other males.

Many slave women raised their children without much assistance from males.

But we found there was a demand from males, too.

The mothers raise their young without aid from adult males.

It is the only known from males, which are brachypterous.

At the age of 18, Nikka had changed her gender from male to female.

Each generation, by and large, was descended from males who would fight for the females.

Ms. Graham also switched the focus from male to female.

Loud calls from males indicate the group is ready to move to another tree to feed.