RESULTS	In the young population , implantation rates were similar : 27.8 % versus 28.6 % , odds ratio ( OR ) 1.03 ( 95 % confidence interval [ CI ] 0.73-1 .47 ) , as was the ongoing pregnancy rate per started cycle : 37.4 % versus 37.4 % , OR 1.0 ( 95 % CI 0.66-1 .52 ) .\