1. In vitro blastocyst formation of human oocytes obtained from unstimulated and stimulated cycles after vitrification at various maturational stages 
Hyung M Chung, Ph.D., Seung W Hong, M.S., Jeong M Lim, Ph.D., Sook H Lee, M.D., Won T Cha, Jung J Ko, Ph.D., Se Y Han, M.D., Dong H Choi, M.D., Kwang Y Cha, M.D. 
Fertility and Sterility 
Volume 73, Issue 3, Pages (March 2000)
DOI: /S (99)

2. FIGURE 1
Experimental design of this study. IVC = in vitro culture; IVM = in vitro maturation.
Chung. Vitrified oocytes. Fertil Steril 2000.
Fertility and Sterility  , DOI: ( /S (99) )

3. FIGURE 2
Morphology and number of chromosomes of a blastocyst developed from a vitrified oocyte. A distinct inner cell mass and expanded blastocele are visible (A), and diploid chromosomes consisting of 23 autosomes and sex chromosomes (XY) are present (B).
Chung. Vitrified oocytes. Fertil Steril 2000.
Fertility and Sterility  , DOI: ( /S (99) )