Children of Everything

In _Children of Men_, humanity suffers from unexplained infertility which 
results in no babies having been born for years, and is expected to 
eventually result in the extinction of the race. The reason isn't 
explained. Maybe God just doesn't like people.

So let's make it a little more general. Maybe God doesn't like sex no 
matter what does it. So one fine day sexual fertility simply switches off.

Asexual reproduction still works, but any sex never results in 
fertilization. What happens?

Life won't come crashing to quite an instant halt since the body's cells 
can still divide and all the really low orders of life keep going just 
fine.

It seems to me that the first to notice may be researchers working with 
fruit flies. I'm not completely clear but it sounds like the failure to 
produce viable eggs may become apparent within a day or so of the event. 
How long until people realize that it's more widespread, and affects all 
plants and animals?

I assume that the atmosphere will remain intact for more than enough time 
for small groups of humans to survive in the long term (until they all die

off from other causes or old age), but how does the world change in the 
meantime, and afterwards?

-- 
Michael Ash
Rogue Amoeba Software