  Braneworld modifications to the Friedmann expansion law can have an important
effect on the cosmological evolution of the early universe. In particular, the
primordial particle abundances crucially depend on the rate at which the
universe expanded at early times. In this article, we study the production of
stable and unstable gravitinos, both from thermal creation and from the decay
of a heavy scalar, in the Randall-Sundrum II braneworld context. We conclude
that, depending on the value of the 5D fundamental Planck mass, some of the
usual standard cosmology constraints on the reheating temperature and on the
mass of the heavy scalar can be evaded.
