Demecolcine-induced enucleation of sheep meiotically maturing oocytes Jian Hou, Tinghua Lei, Lei Liu, Xiuhong Cui, Xiaorong An and Yongfu Chen Reprod. Nutr. Dev., 46 2 (2006) 219-226 Published online: 06 April 2006 DOI: 10.1051/rnd:2006002