By the time the playwright Liba Vaynberg and I manage to steal a few minutes on Zoom, it’s already midday on a Friday, which means I’m running late from an appointment at a wig maker and frantically marinating a chicken for Shabbat dinner.

I wouldn’t normally describe the circumstances of an interview in an article, but it seems relevant given the subject of Vaynberg’s upcoming play, “The Matriarchs.” It’s a deeply Jewish work that follows six recently bat mitzvahed Modern Orthodox girls — as well as a snippy yet maternal, possibly omniscient voice off-stage — as they move from their early teens through adulthood, and face struggles with faith, fertility, marriage and grief.

Opening on Sept. 10 at Theaterlab , “The Matriarchs” begins with the heroines — who are all loosely based on

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