diff --git a/uvicorn/supervisors/multiprocess.py b/uvicorn/supervisors/multiprocess.py
index 87ce91f15..81fe4ab5e 100644
--- a/uvicorn/supervisors/multiprocess.py
+++ b/uvicorn/supervisors/multiprocess.py
@@ -1,6 +1,7 @@
 import logging
 import os
 import signal
+import sys
 import threading
 from multiprocessing.context import SpawnProcess
 from socket import socket
@@ -42,7 +43,9 @@ def signal_handler(self, sig: int, frame: Optional[FrameType]) -> None:
 
     def run(self) -> None:
         self.startup()
-        self.should_exit.wait()
+        while True:
+            if self.should_exit.wait(self.config.reload_delay):
+                break
         self.shutdown()
 
     def startup(self) -> None:
@@ -64,7 +67,10 @@ def startup(self) -> None:
 
     def shutdown(self) -> None:
         for process in self.processes:
-            process.terminate()
+            if sys.platform == "win32":
+                self.should_exit.set()  # pragma: py-not-win32
+            else:
+                process.terminate()  # pragma: py-win32
             process.join()
 
         message = "Stopping parent process [{}]".format(str(self.pid))