Substituted or unsubstituted p-alkanoyl toluenes as male anti-fertility agents

A method of controlling fertility in male animals, which comprises administering to a male animal in need of said treatment an anti-fertility effective amount of a compound of the formula:

• ##STR2## where R.sub.1 represents hydrogen, halo having an atomic weight of about 19 to 36, or straight chain lower alkoxy, and
• R.sub.2 and R.sub.3 each independently represent alkyl having 1 to 2 carbon atoms.