Abstract
To document normative data on penile size and anogenital distances of apparently normal term male infants in Sagamu, Nigeria. This cross-sectional study was carried out on 303 term male infants within the first 72hours of life. Stretched penile length, penile width and three measures of anogenital distances were recorded: anogenital distance-1, anogenital distance-2 and anoscrotal distance. The mean (±SD) stretched penile length and penile width were 39.4±4.2mm and 11.0±1.0mm, respectively. The mean values for anogenital distance-1, anogenital distance-2 and the anoscrotal distance were 48.7±3.9mm, 42.8±4.6mm and 25.5±3.9mm, respectively. Only penile width and anogenital distance-1 significantly correlated with all the anthropometric parameters but anogenital distance-1 had the strongest correlation (p<0.01 for all). The observed mean stretched penile length was greater than previously reported. Local references are preferable in interpreting anogenital measurements in newborns to avoid diagnostic errors. There is need for a consensus on the definition of micropenis.
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