The lines without title cards
The trivia page says:
Two key lines in the film have no intertitles, the viewer having to lip read them. About 64 minutes into the film, Kate reveals to Philip "Philip, I am going to have a baby." 4 minutes later, she reveals to her husband Pete "I am going to have a baby."
I agree with the second one, but I had serious trouble lip-reading the first one. The "Hitchcock/Truffaut" book says it's "I'm expecting a baby." Which is it?
Also, these were around 50 minutes into the version I saw, probably because of different running speeds.