fertspit 

The act of spitting in a cup and testing the saliva with Litmus paper to determine one's prime time to get knocked up.

also see fertspitter

My old lady fertspit purple so I'm going to hit it in the rear tonight, perhaps even hockey style.

fertspit by michaelchaskey October 16, 2008

fertspitter 

A woman who spits in a cup in the morning to determine her level of fertility.

also see fertspit

That megabeast up front is the only fertspitter I've ever known.

fertspitter by michaelchaskey October 16, 2008