Effect of cryopreservation stages by vitrification in ethylene glycol and sucrose medium on 2-cell murine embryos electric conductivity - E. I. Smoljaninova; V. A. Shigimaga; O. A. Strikha; L. I. Popivnenko; E. G. Lisina (Problems of cryobiology and cryomedicine, 2013)