After cooking a dozen lasagnas for Aunt Sylvia, Monica is stuck with them as they were supposed to be vegetarian. Ross is acquainting himself with pregnancy-related stuff. Ross goes to visit Carol to drop off one of the lasagnas and is thrilled to learn that the baby is completely healthy, but he doesn't want to learn the baby's sex. Carol and Susan, however, know it. The list of people who know the baby's sex is extended to everyone except Ross: Carol calls Monica to thank her for the lasagna, and she tells Monica. Monica then tells Joey, Rachel, Chandler.