Did Lady Gaga have her first child?

Lady Gaga and fiancé Michael Polansky have welcomed their first child, according to sources cited by People, Page Six and other outlets, though the couple hasn't confirmed it themselves publicly [1, 2, 3]. Reports followed paparazzi photos of the pair in Northern California with a newborn [1, 2], and the arrival comes about two and a half years into their relationship [3].