Tina Fey recently announced she's expecting her second child and showed off her baby bump while leaving 'The Late Show With David Letterman' Monday evening.

In her new book, 'Bossypants,' Fey, who is five months pregnant, opens up about deciding whether to have a second baby with husband Jeff Richmond.

Fey, 40, said she was "stricken with guilt and panic" when her 5-year-old daughter Alice would say, "I wish I had a baby sister." She also had her career to consider.

"Science shows that fertility and movie offers drop off steeply for women after 40," she writes. "Hollywood be damned. I'll just be unemployable and labeled crazy in five years anyway."