Jim and Pam are having a baby this week on The Office and, unfortunately that's been one of those TV conventions that tends to send shows on a downward spiral. The Office has already barely survived the marriage of two leads (another frequent show killer), so to now add a baby to the mix is just asking for shark-jumping trouble. While a drama like Friday Night Lights, which is built around familial struggles, or a series like Friends, where characters mostly forget about their kids, can sustain their quality levels postpartum, plenty of other programs haven't fared as well after the stork dropped off its little bundle (or two) of joy. Here's a look back at some of the unwelcome arrivals that put a damper on once-successful shows.

Tags: 7th heaven, angel, beverly hills 90210, Family Ties, full house, growing pains, mad about you, murphy brown, roseanne