According to Jim - Poking The Bear

Seizoen: 4 - Aflevering: 9 / 88 - Eerst uitgezonden: 30 november 2004 - Episode ID: 5743

Cheryl's gynecologist (played by Mitch Rouse) forbids her from having sex with Jim until the time is right to get pregnant, and Jim eats crow in order to win a huge account from a blowhard potential client (Tom Arnold).