Answer the following question given this paragraph: 

The gonads secrete sex hormones. The male gonads are called testes. They secrete the male sex hormone testosterone. The female gonads are called ovaries. They secrete the female sex hormone estrogen. Sex hormones are involved in the changes of puberty. They also control the production of gametes by the gonads.


Q: What kind of hormones are secreted by organs classified as gonads?


A:
sex hormones