They really can't be compared because the people doing eveyr 4 days are either on Clomid, have reduced fertility for some reason, or else have gone on a really long time not getting pg (longer on diet) and people in those categories may be more set for pink than those who get pregnant with other methods. This may make every 4 days look more effective than it would be for the average person and until we have more results, I prefer to see most people start off doing one attempt and then you can always go to every 4 days at some point if need be.