As Seen In: "The Inheritance" (Season 2, Episode 10)
Trudy spends much of the second season wanting to have a child. She and Pete visit a fertility clinic, and eventually Trudy proposes adoption. Pete won't hear of it ("It's someone else's child...It's not natural.")
Viewers know that the baby won't change Pete into a better person. Margaret Lyons of Vulture has argued that the show is anti-pregnancy, and cited the failure of Pete to become a better father as evidence.
But the fact is, Mad Men is anti-betterment. It's a show about failure, punctuated by brief, sometimes shining moments of non-failure.