Jordaan H V
S Afr Med J. 1976 Jul 14;50(30):1166-70.
Data on the biparietal diameter (BPD), determined ultrasonically, of the full-term South African Negroid fetus are presented. Population differences in the absolute value of the BPD and the linear regression of birth weight on the biparietal dimension are emphasised. The possible biological explanations for these differences are discussed.
本文给出了通过超声测定的南非足月黑人胎儿双顶径（BPD）的数据。强调了双顶径绝对值的人群差异以及出生体重与双顶径维度的线性回归。讨论了这些差异可能的生物学解释。
