【摘要】 材料为泰安市引产的9～38周胎儿标本421例,对耳郭的长、宽和游离缘边长进行了测量;对213例耳郭和耳垂的类型进行了观察.结果表明,其各数值均随胎儿的发育而增大,24周前耳郭发育迅速,长和宽每月增长3～4mm,游离缘边长每月增加4～7mm.25周始增长较前缓慢.耳郭和耳垂的分型在13周前不典型,20周始明显.耳郭以V型占多数(47.8%),耳垂以圆形为主(56.81%).更多还原

【Abstract】 We investigated 421 fetuses of 9-38 weeks old in Taian city, and measured the length and width of the auricle as well as its length of periphery. We also observed the types of external ear and lobe in 213 cases. The results showed that every numerical value increased with the fetal development. The auricle developed quickly before 24 weeks, its length and width increasing about 3-4 mm a month and the length of periphery about 4-7 mm. From 25 weeks on, every numerical value increased slowly. Classification of the auricle and lobe was difficult before 13 weeks, but became distinct after 20 weeks. Type V predominated in the auricle (47.89%), while the round shape predominated in the lobe (56.81%).更多还原