Paula Vogel’s And Baby Makes Seven has all the ingredients for a successful play, and none of the results.

This ultimately tedious exercise has one wonderfully interesting idea – that a lesbian couple has invented a small group of imaginary sons – and then restates it relentlessly without any real development or variation. The three actors in the play – Alison Burns (pictured center), Jessica Rothert (right) and David Jenkins – are talented enough, and Karla Hartley as usual offers vibrant and intelligent staging. But this is a text without real insight, without larger meaning or even suspense, and no collection of artists can make it stageworthy for more than a half hour.

I’m a big fan of Vogel’s Pulitzer Prize-winning How I Learned to Drive, but you’d never know from watching Baby that its author is the same one who gave us precocious Li’l Bit and her deviously abusive Uncle Peck.