Bring a large pot of salted water to a boil, add the fettuccine, and cook for 8 to 10 minutes until al dente, then drain.
While the pasta cooks, melt the butter in a large skillet over medium-high heat for 1 minute.
Add the shrimp and garlic to the skillet and cook for 3 to 4 minutes, stirring occasionally, until the shrimp turn pink and opaque.
Pour in the heavy cream and bring to a gentle simmer for 2 minutes, then stir in the Parmesan cheese and black pepper until the sauce is smooth and creamy.
Add the drained pasta to the skillet, toss for 1 minute to coat evenly, then garnish with fresh parsley and serve immediately.