Difference between Fetoprotein and Foetoprotein

What is the difference between Fetoprotein and Foetoprotein?

Fetoprotein as a noun is any of several antigens produced in a developing embryo, of which the most common is alpha-fetoprotein while Foetoprotein as a noun is

We hope you now know whether to use Fetoprotein or Foetoprotein in your sentence.