What would you do if you got pregnant after a one-night stand? That's the dramatic conceit of "Babes," which turns out to be a very funny comedy about pregnancy, motherhood, and above all, friendship.

In one of the first scenes of the new comedy Babes, free-spirited Eden (Ilana Glazer) gets down on her knees to peer at her best friend’s vagina. Pragmatic Dawn (Michelle Buteau) is going into labor, ...