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We revisit the gravitino generation from the MSSM thermal plasma taking into account the global U(1) R-symmetry that generically characterizes the supersymmetry breaking sectors. In the reheated early universe the thermal effects tend to restore the R-symmetry. An R-symmetric phase suppresses the gaugino masses and hence the production of the helicity 1=2 gravitino component from the MSSM sector. We show that the gravitino yield from the MSSM is dominated by the temperature that the R-symmetry breaking takes place and not by the reheating temperature of the universe.

A natural solution to the gravitino overabundance problem