These sharks are long-lived and mature late. Ovoviviparous, with litters of 1 to 20 young. Gestation period of 18 to 24 months, longest known of all chondrichthyans. Size at birth 18-30 cm. Sex ratio at birth is 1:1. Mating may occur in winter.
Bigelow, H. B. and Schroeder, W. C., 1953; Compagno, L. J. V., 1984; McAllister, D. E., 1990; Cox, G. and M. Francis, 1997.