you will notice after afew grows under your belt that how important those fan leaves areduring the plants budding process. it is so essential that yield is affected. when your plant is finished look at a branch that has a fan leaf and all leaves that are suppose to be on that branch. now look at ones that have lost them very early. there will be a considerable amount diffrent in weight, size for sure. i noticed with mj that it dominoes very fast if not corrected asap. it will start on bottom then work up all fan leaves then other vital leaves will domino on you the same way. sure the bud leaves are green but there is not enough foilage to support a GREAT yield. just try not to lose any leaves in flowering unless it is natural.