Developmental disparity between in vitro-produced and somatic cell nuclear transfer bovine days 14 and 21 embryos: implications for embryonic loss.
Alexopoulos NI, Maddox-Hyttel P, Tveden-Nyborg P, D'Cruz NT, Tecirlioglu TR, Cooney MA, Schauser K, Holland MK, French AJ. Developmental disparity between in vitro-produced and somatic cell nuclear transfer bovine days 14 and 21 embryos: implications for embryonic loss. Reproduction. 2008 Oct; 136(4):433-45.