%0 Journal Article %T A comparison of the effects of estrus cow serum and fetal calf serum on in vitro nuclear maturation of bovine oocytes %A Spiropoulos J %A Long SE %J Genetics Selection Evolution %D 1991 %I BioMed Central %R 10.1186/1297-9686-23-s1-s201 %U http://www.gsejournal.org/content/23/S1/S201