Richie: (regarding a pregnant Louisa) I thought she should stay here because, well, I'm responsible.
Marion: You, Richard? But you get such good grades!
This storyline is continued on episode 18 of Laverne & Shirley, "Bachelor Mothers." In this episode, godfather Fonzie takes the baby born in the Happy Days episode to Laverne and Shirley's so they can babysit for him.