The basic plot idea of the sitcom's 1972 episode "Maude's Dilemma" -- a middle-aged woman becoming pregnant and the mother considering abortion -- serves as the template for the episode.
Brian spoofs the Cowardly Lion from The Wizard of Oz then he tries to stay in the house when he finds out Lois' friend Naomi is the one coming over to see Lois
When Lois is at the fertility clinic, she is being inseminated by howitan blowgunners. When she protests, the doctors says "Well you could tell them, if you only spoke howitan", which is a direct quote from the beginning scene of "Raiders of the Lost Ark"