The female reproductive system includes internal and external organs, each designed to carry out varying functions. Learn ...

Reproductive system of birds The gonads develop from two sources ... which will develop into testes if the bird becomes a male or into the ovary if the bird becomes a female. Several thousand cells ...

Additionally, same-sex and multi-sex mating systems have been documented in birds, meaning that relying just on data representing a male-female binary excludes a broader spectrum of reproductive ...