1. Recombinant human leukemia inhibitory factor enhances the development of preimplantation mouse embryo in vitro 
Horng-Der Tsai, M.D., Chi-Chen Chang, M.D., Yao-Yuan Hsieh, M.D., Hui-Yu Lo, M.D., Li-Wei Hsu, Ph.D., Su-Chen Chang, Ph.D. 
Fertility and Sterility 
Volume 71, Issue 4, Pages (April 1999)
DOI: /S (98)

2. FIGURE 1
Mouse embryos at the two-cell stage (original magnification, ×100).
Fertility and Sterility  , DOI: ( /S (98) )

3. FIGURE 2 Expanded mouse blastocyst.
Fertility and Sterility  , DOI: ( /S (98) )