Further recent reliable but unconfirmed reports originated during the same period from Australia, Taiwan, and most recently Kenya. Gestation time is unknown but likely to be long. Contrary to some popular publications, this species does not exhibit 'uterine cannibalism' such as found in the sandtiger shark, Carcharias taurus . Conceivably, females may give birth every two years rather than annually.
Birth apparently occurs during the spring to late summer in warm-temperate coastal waters.
Areas where mature adults and newborns occur together, indicative of reproduction, include the shelf waters of the N.E. United States, Southern California, Southern and Eastern Australia, New Zealand, Japan, Eastern Cape Province of South Africa and the Southern-Central Mediterranean Sea.