The phrase "a fortuitous effect" is correct and usable in written English.
It can be used to describe an outcome that occurs by chance and is often positive or beneficial.
Example: "The new marketing strategy had a fortuitous effect, leading to an unexpected increase in sales."
Alternatives: "an accidental outcome" or "a lucky result".
Pinker proposed that music may be a fortuitous side effect of diverse perceptual and cognitive mechanisms that serve other functions (Pinker 1997).
But does this imply that differences in tRNA repertoires represent selected adaptations to reduce frameshifting costs or is anticodon diversity under selection for other reasons, for example translational efficiency (Higgs and Ran 2008), and reduction in error rates constitutes a fortuitous side effect?
As the last section of the exhibition, entitled "Tombs," demonstrates, this is a trend that encouraged more elaborate sepulchers and also had the fortuitous effect of enriching posterity's knowledge of various aspects of Roman everyday life.
In traditional incandescent bulbs, only about 5% of the electricity used is converted into light, while the rest is wasted as heat – the bulbs are therefore little more than tiny electric heaters which give out light as a fortuitous side-effect.
Years preceding the ATS's introduction, Cadillac witnessed a fortuitous "knock-on effect" when it introduced a coupe version of its CTS sedan, whereby sales of the sedan rose by a consistent 300 cars per month.
It is shown that self-imaging is a rather extraordinary effect related to a fortuitous band collapse and it is thus rather distinct from self-collimation.
In 1933 Hitler came to power not through a palace coup or a fortuitous assassination but through the mechanisms of German democracy which he distorted and manipulated to extraordinary effect.
It was a fortuitous development.
"It's a fortuitous confluence".
It proved to be a fortuitous decision.
