1. Clinical experience and perinatal outcome of blastocyst transfer after coculture of human embryos with human endometrial epithelial cells: a 5-year follow-up study 
Amparo Mercader, Ph.D., Juan A Garcia-Velasco, M.D., Ernesto Escudero, M.D., José Remohí, M.D., Antonio Pellicer, M.D., Carlos Simón, M.D. 
Fertility and Sterility 
Volume 80, Issue 5, Pages (November 2003)
DOI: /S (03)

2. FIGURE 1
Blastocyst development (black squares), implantation (white squares), and pregnancy (gray squares) rates from 1997 to 2001 in patients undergoing IVF. Whereas the blastocyst development rate has remained throughout the years, the implantation and pregnancy rates increased dramatically after an initial “learning curve” period of 2 years.
Mercader. Coculture of human embryos with human endometrial epithelial cells. Fertil Steril 2003.
Fertility and Sterility  , DOI: ( /S (03) )

3. FIGURE 2
Blastocyst development (black squares), implantation (white squares), and pregnancy (gray squares) rates from 1997 to 2001 in patients undergoing oocyte donation.
Mercader. Coculture of human embryos with human endometrial epithelial cells. Fertil Steril 2003.
Fertility and Sterility  , DOI: ( /S (03) )