Halley Wolowitz is the daughter of Howard Wolowitz and Bernadette Rostenkowski-Wolowitz. In "The Valentino Submergence", Howard and Bernie nurse a rabbit back to health that almost drowned in their hot tub looking very parental while doing it. After Howard heads to the emergency room, Bernadette tells the rabbit that she'll have to find another time to tell Howard that she's expecting. The rabbit didn't die, but that is also a cliche for being pregnant. In "The Fetal Kick Catalyst", the baby kicks and this prompts Howard to go on a shopping spree.