NCBI ROFL: Should the definition of micropenis vary according to ethnicity?

By ncbi rofl | November 27, 2009 4:00 pm

“OBJECTIVE: We determined whether the existing reference values for the diagnosis of micropenis are appropriate for optimal care of neonates in a multiethnic environment like Vancouver. METHODS: The stretched penile length and width were measured in 105 full-term newborn males of Caucasian (n = 40), Chinese (n = 40) and East-Indian origin (n = 25). RESULTS: Mean length -2.5 SD was used for the definition of micropenis and was 2.6, 2.5 and 2.3 cm for Caucasian, East-Indian and Chinese babies, respectively (p < 0.05). This is close to the widely accepted recommendation that a penile length of 2.4- 2.5 cm be considered as the lowest limit for the definition of micropenis. CONCLUSION: Mean penile length and diameter are slightly but significantly smaller in newborns of Chinese origin compared to newborns of Caucasian and East-Indian origins."

  • micropenis

    In my opinion the results were so close together that it would be foulish to vary the definition of a micropenis according to ethnicity. Whats the point anyway? If your penis has a size of 2.7 cm it is considered normal and when it is 2.6 cm it is a micropenis?

  • M Cufley

    People will always want definitions and measurements, but the subject is too complex for a simple statistic and however well intentioned we seek to refine the parameters, we need to examine each case on its own merits. e.g. weight and body mass index.


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NCBI ROFL is the brainchild of two Molecular and Cell Biology graduate students at UC Berkeley and features real research articles from the PubMed database (which is housed by the National Center for Biotechnology information, aka NCBI) that they find amusing (ROFL is a commonly-used internet acronym for "rolling on the floor, laughing"). Follow us on twitter: @ncbirofl


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