Tabela I. Shows the results obtained in Group A (at least one 8- cell embryo transfered) and Group B (all embryos between 4 and 7-cell al transfer). Results were significantly better which at least one 8-cell embryo was replaced.
Group A Group B
Cases 69 36
Average No. Transferred 2.3 2.4
Pregnaneies 28 [40.1%LBR] 7 [19.4%LBR]

p<0.05 Fisher's Exaet (Instat, Graphpad, San Diego)