Canada’s Dionne quints were celebrated for being the first to survive infancy, but their lives continued to be difficult.

(Siblings can have surprisingly different DNA ancestry. Here's why.) Birth order has also long determined inheritance rights and royal lines of succession, as in the British monarchy which has ...

Jasmine Guy plays Norma, mother to Cynthia Erivo’s quintuplets in Season 1 Episode 2. The quintuplets all had strained relationships with their mother, who kept residuals from their childhood ...