Ultrastructure of Human Unfertilized Oocytes and Polyspermic Embryos in an IVF-ET Program a


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    This work was supported by grants from CNR and MPI during the period 1985–1987.

Address for correspondence: Prof. Pietro M. Motta, Department of Anatomy, University Medical School “La Sapienza,” Viale Regina Elena 289, Rome 00161, Italy.