Salgado L, Paz J E
Centro de Educacion Medica e Investigacion Clinica, Sector Genetica, Buenos Aires, Argentina.
Early Hum Dev. 1992 Dec;31(2):167-9. doi: 10.1016/0378-3782(92)90044-h.
The distances between the xyphoid appendix and the insertion point of the umbilical cord (XU) and between the xyphoid appendix and upper edge of the pubic symphysis (XP) were measured in 201 newborn infants. The mean ratio XU/XP was 0.62 (S.D. 0.044) with no differences between sexes nor correlations with weight or length. Ratios lying between 0.53 and 0.71 can be considered as within the normal range.
在201名新生儿中测量了剑突与脐带插入点（XU）之间以及剑突与耻骨联合上缘（XP）之间的距离。XU/XP的平均比值为0.62（标准差0.044），性别之间无差异，与体重或身长也无相关性。比值在0.53至0.71之间可视为在正常范围内。
