Why was Beverly Crusher the only bridge crew member who had children? (single mom, though no one's fault as Jack died an honorable red-shirt death on an away mission). Picard hated children, Worf didn't know he had one, though when he did, he attempted fatherhood, failed at it and sent the child to live with his grandparents.

In DS9, once again, only two of the bridge crew have families, with the Commander in the same single parents due to Picard situation. Worf does have an episode with his son, where Worf's absence shows his son's challenges in learning to be a Klingon.