1. Evaluation of the immature human oocytes from unstimulated cycles in polycystic ovary syndrome patients using a novel scoring system 
Shan Liu, M.D., Ph.D., Jing-Jing Jiang, M.Sc., Huai-Liang Feng, Ph.D., Shui-Ying Ma, M.D., Mei Li, M.Sc., Yuan Li, M.D., Ph.D. 
Fertility and Sterility 
Volume 93, Issue 7, Pages (May 2010)
DOI: /j.fertnstert
Copyright © 2010 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Immature MI phase oocytes from grade 4 to grade 0 (magnification 200×). (A) Grade 4; (B) grade 3; (C) grade 2; (D) grade 1; (E) grade 0.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2010 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2
Immature GV phase oocytes from grade 4 to grade 0 (magnification 200×). (A) Grade 4; (B) grade 3; (C) grade 2; (D) grade 1; (E) grade 0.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2010 American Society for Reproductive Medicine Terms and Conditions