My first answer was "No", yet:
"Our knowledge of the many different types of reproductive strategies of sharks is still limited. This variety is precisely why it is difficult to make a certain generalization on their reproductive methods, although these are what make sharks so successful. Sharks have optimally adapted their reproduction to the most different conditions.
Most sharks bear live young (viviparity), others lay eggs. Several shark species mate the entire year, others prefer certain seasons and regions. The females of some shark species bear young each year, others stop reproducing at irregular intervals which can last several years." - sharkfoundation.ch
