1. Successful pregnancy and delivery of two sets of monozygotic twins after intracytoplasmic sperm injection and embryo transfer: case report and literature review 
Ozren Grgic, M.D., Marina Ivanisevic, M.D., Ph.D., Josip Djelmis, M.D., Ph.D., Drazen Lucinger, M.D., Lana Krile, M.D. 
Fertility and Sterility 
Volume 92, Issue 1, Pages 392.e5-392.e8 (July 2009)
DOI: /j.fertnstert
Copyright © 2009 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Sonographic scan of two pair of monozygotic twins in the ninth week of pregnancy.
Fertility and Sterility  , 392.e5-392.e8DOI: ( /j.fertnstert )
Copyright © 2009 American Society for Reproductive Medicine Terms and Conditions