Arnold SchwarzeneggerArnold Schwarzenegger spent time in obstetricians' waiting rooms to learn how pregnant women behave.
The campus in the film is called "Leland University". The actual location was the University of California at Berkeley, whose sports rival is Stanford University, in Palo Alto, California, which was named after [?] Leland Stanford.
Following Twins and Kindergarten Cop, this is the third film in an unconnected trilogy of comedies directed by Ivan ReitmanIvan Reitman and starring Arnold SchwarzeneggerArnold Schwarzenegger. Schwarzenegger's co-stars in this film include Danny DeVitoDanny DeVito (who also starred in Twins) and Pamela ReedPamela Reed (who also starred in Kindergarten Cop). All three films involve a theme of childrearing.
Out of all the films Ivan ReitmanIvan Reitman has made with Arnold SchwarzeneggerArnold Schwarzenegger, he has cited Junior as his favourite.