<unk>  is the generic term for any natural or synthetic compound, usually a steroid hormone, that stimulates or controls the development and maintenance of masculine characteristics in vertebrates by binding to<unk>  receptors.  This includes the activity of the accessory male sex organs and development of male secondary sex characteristics.<unk> s, which were first discovered in 1936, are also called<unk> ic hormones or testoids.<unk> s are also the original anabolic steroids.  They are also the precursor of all estrogens, the female sex hormones.  The primary and most well-known<unk>  is testosterone.
Androgen
Estrogen
Progesterone 
Methyltestosterone
Estradiol 
Testolactone
17-Hydroxyprogesterone
Dihydrotestosterone