Cook the fettuccine according to package instructions until al dente.
Drain the pasta and set aside, reserving some pasta water.
In a large skillet, melt butter over medium heat.
Add minced garlic and sauté until fragrant.
Add shrimp and season with salt and pepper; cook until pink and opaque.
Pour in the heavy cream and bring to a simmer.
Stir in the Parmesan cheese until the sauce is smooth.
Add the cooked fettuccine, tossing to coat.
If needed, add reserved pasta water to reach desired consistency.
Garnish with fresh parsley before serving.