In this study,the ontogeny of body and the growth pattern of heart,brain,liver,lung,gizzard,glandular stomach and spleen of duck embryos were measured from embryonic day 2 to embryonic day 26. The results indicated that the organs development trend of absolute growth and relative growth rate were almost synchrony,and both exhibited increase from embryonic day 20 to embryonic day 22. The whole growth intensity was from strong to weak with age increasing. The results of differentiation growth rate and the relative growth coefficient indicated that the brain and heart was premature while gizzard was serotinous; the liver,gizzard,and spleen occupied the dominant position on embryonic days 16,18 and 26. Therefore,duck embryos growing process was in a wave type state; different organs of duck embryos had different growth and development patterns; the relative growth index could supersede the differentiation growth rate preferably.
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