: What % does birth weight,205 da. 365da.and<br>: parent and grandparents or any other componant<br>: effect epds.<p>EPD's are calculated by taking 1/2 from the maternal grand sire and 1/2 from the sire. Birth weight is how many more or less pounds the offspring are expected to weigh than the breed average, 205d is expected weaning weight more or less than the breed average, and same for 365 day wight. It is important to remember that you can not compare different breeds EPD's unless you have acees to an accross breed EPD calulations.<br>mike