1. Use of the egg-share model to investigate the paternal influence on fertilization and embryo development after in vitro fertilization and intracytoplasmic sperm injection 
Denny Sakkas, Ph.D., Yvonne D'Arcy, B.Sc., Gail Percival, M.Sc., Lucinda Sinclair, R.N., Masoud Afnan, M.D., Khaldoun Sharif, M.D. 
Fertility and Sterility 
Volume 82, Issue 1, Pages (July 2004)
DOI: /j.fertnstert

2. Figure 1
The difference in mean embryo score between transferred embryos from patients undergoing egg sharing when either (A) both patient couples underwent IVF or when (B) one couple was treated by ICSI and the other IVF. Mean embryo score was calculated as stated in the Materials and Methods. The mean embryo score for all transferred embryos was then calculated for the sharer and recipient. Subtracting the sharer and recipient score represents the difference in mean embryo score.
Sakkas. Egg sharing evidences a paternal influence. Fertil Steril 2004.
Fertility and Sterility  , 74-79DOI: ( /j.fertnstert )