Life Expectancy: A Comedy In Three Trimesters is about a 40-something couple who finally get pregnant. Narrated by the slightly smug authors of a “What to Expect” book, the couple is led on a nine month journey through their fears and fantasies, nightmares and secrets. The play’s extra layer is the screenwriting project the mother-to-be has (perhaps unwisely) taken on, which plays in the background as counterpoint and commentary in this hilarious and moving new play by acclaimed writer Catherine Butterfield.