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Progression of meiosis in porcine oocytes matured in vitro and the polyspermy problemC.G. Grupen; H. Nagashima; M.B. Nottle · 1996
Vitrification of porcine early cleavage stage embryos and oocytes after removal of cytoplasmic lipid dropletsH. Nagashima; M. Kuwayama; C.G. Grupen; R.J. Ashman; M.B. Nottle · 1996