Directed by: Amy Heckerling
Starring: John Travolta, Kirstie Alley, George Segal, Olympia Dukakis
Other mistake: When James is taking Mollie to the hospital, he drives through a construction site and starts driving backwards, then does a 360 degree turn. In the aerial shot, you can see the skid marks from previous takes.
Other mistake: When Mollie changes Mikey's diaper in Albert office, she just changes the diaper without cleaning his butt.
Factual error: In the beginning sequence where they show the sperm first fertilizing the egg, it is biologically incorrect - only the head part of the sperm enters an egg, everything else stays on the outside and eventually dies off.
Mikey: Wait a minute. These things come in different sizes? What are these? Jumbos?
Trivia: Mollie's father was played by Louis Heckerling, father of the film's director Amy Heckerling.