She studied the effects of pollution on the 'fertility' of the local fish population.
The doctor ordered a test of his/her 'fertility'.
The area is known for its soil 'fertility'.
(..) Med School with research. What kind of research? Just, you know, science. Science. Yeah, I think I've heard of that. It's a fertility study. Joey, please tell me you're only donating your time. Actually, a little more than that. Thank you, God. This will bring us so much joy. (..)1995 TvShow: Friends Title: The One Where Rachel Finds Out Season: 1 Episode 24