Females have one functional ovary (the left) and two functional uteruses, with the embryos evenly distributed in each one. The newborns measure 38–44 cm (15–17 in) across; their size is inversely related to the number of young in each uterus.[2][3] In the eastern Atlantic, males mature at around 78 cm (31 in) across and females at 108 cm (43 in).