Similar results were obtained between groups for all the parameters compared : fertilization rates of 75.3 % ( 95 % confidence interval [ CI ] , 71.6-78 .9 ) versus 72.1 % ( 95 % CI , 68.6-75 .7 ) ; percentage of good-quality embryos on day 2 of 53.7 % ( 95 % CI , 50.3-57 .1 ) versus 51.8 % ( 95 % CI , 48.3-55 .3 ) and on day 3 of 54.2 % ( 95 % CI , 50.7-57 .6 ) versus 48.9 % ( 95 % CI , 45.3-52 .4 ) ; implantation rates of 42.2 % ( 95 % CI , 33.8-48 .1 ) versus 40.1 % ( 95 % CI , 34.8-49 .6 ) ; positive beta-hCG tests of 63.2 % ( 95 % CI , 54.7-71 .6 ) versus 68.6 % ( 95 % CI , 60.2-76 .9 ) , and live-birth rates of 48.4 % ( 95 % CI , 39.6-57 .1 ) versus 56.4 % ( 95 % CI , 47.3-65 .5 ) in the MACS versus control group .