“Everyone else is having a child; why can’t we?” Andrew Kaplan asks in his autobiographical one-man show, “He’s Having a Baby.” Written and performed by Mr. Kaplan, the play tells the story of the harrowing three years he and his wife, Chuv, spent trying to conceive a child.

“He’s Having a Baby” begins with Mr. Kaplan as his 6-year-old self, whose dreams include not only being a baseball player or astronaut but also having a family with at least five people in it. Cut to his future. He meets his dream girl on a subway car, marries her, enjoys a year of marital bliss, then decides to start trying for a baby. But it doesn’t happen.

The couple tracks Chuv’s menstrual cycle religiously, visits doctors, and prays, finally fearing that maybe they aren’t meant to have children. To make matters worse, Mr. Kaplan, dressed in black and roaming the stage, is taunted by the voices of the people around him. “‘It’s been three years,'” he recalls people whispering. “‘Do you think something is going on with them?'”

Under the direction of Cosmin Chivu, Mr. Kaplan gives voice to many people and things — his mother and father, the teacher at Yeshiva who won’t tell him about sex, the wide-eyed girl to whom he lost his virginity, his sperm, his surprisingly gruff-voiced unborn child, a kindly Irish nurse with a big brood of her own, and birth control pills who make a threatening phone call. Mr. Kaplan chronicles every false hope and trip to the Duane Reade for another pregnancy test — a jumbo EPT is one of the few props.

The set is minimal, but clever lighting and music transport Mr. Kaplan from Studio 54, which he visited as a prepubescent high school student, to the closet-sized bathroom with a door that may or may not be locked when he has to collect his sperm in a tiny plastic cup.

But while the inclusion of painstaking details is generally effective, the minutiae occasionally bog down the monologue. Is it necessary to mention that Chuv’s medicine came by Federal Express? Frequently, Mr. Kaplan throws out a lot of information very quickly, and some of it gets buried.

But the intimate details work to create an intimate portrait of a relationship. Mr. Kaplan and his wife’s relationship is what anchors the show and gives it a depth beyond the typical male perspective on menstrual cycles and talking sperm. “He’s Having a Baby” is a story of marriage, a strong one.

Until December 23 (212 W. 29th St., between Seventh and Eighth avenues, 212-352-3101).