The results per transfer were similar : statistically significantdifferences in ongoing pregnancy rate of 54.5 % ( 95 % CI , 49.6-59 .2 ) versus 45.3 % ( 95 % CI , 40.3-50 .4 ) and not statisticallysignificantfor pregnancy rate at 65.2 % ( 95 % CI , 60.6-69 .8 ) versus 61.1 % ( 95 % CI , 56.2-66 .1 ) .