Three of director Chris Columbus' children appear in this movie. Eleanor Columbus plays a little girl in ballet class, Brendan Columbus plays a little boy on the beach, and Violet Columbus plays the baby in the toys store.
After Samuel has his ear pierced, he goes to a party with his friend. When he sits with the cat on his lap, the earring repeatedly switches ears between shots.
When Rebecca is to be given an epidural the Dr. walks in with a huge needle. Epidurals are not administered that way. It is a procedure that takes at least 10-15 minutes.