Abstract
Background: Local normative data for penile size will aid physicians in clinical practice. There are no studies on stretched penile length (SPL) in newborn Turkish boys.Objective: To establish normative data for SPL of newborn Turkish boys and compare these with data from different countries. Methods: 514 newborn Turkish boys, who were not small for gestational age (SGA) or premature, were included in this cross−sectional study. SPLs of the newborns were measured by the same investigator. The correlations between SPL and gestational age, weight, length, and head circumference were evaluated.Results: The 3rd percentile value for SPL was found as 3.00 cm in these Turkish newborns. Positive correlations were shown between SPL and height (r=0.240, p<0.001), weight (r=0.251, p<0.001), and head circumference (r=0.235, p<0.001). Multiple linear regression analysis showed that SPL positively correlated with height and head circumference (p=0.021 and p= 0.042, respectively).Conclusions: This is the largest study on SPL in newborns from our country. This normative data can be used in clinical practice for defining micropenis.Conflict of interest:None declared.
Highlights
Since penis size is reported to vary between different races [1,2,3,4], reference values based on local normative data for penile length are important to avoid overestimation or underestimation
We found no correlation between stretched penile length (SPL) and gestational age (r=0.051, p=0.248)
The results of the univariate correlation test revealed a positive correlation between SPL and body length (r=0.240, p
Summary
Kutlu AO Stretched Penile Length of Newborns vaginal delivery. Written informed consent was obtained from the parents. Two consecutive penile measurements were made, and the mean value was calculated. Weight, and head circumference of the patients were measured. All children were uncircumcised.All measurements were performed by a single examiner.The study was approved by the hospital ethics committee. The Pearson’s correlation coefficient was used to determine the presence of a linear relationship between SPL measurements and gestational age, length, weight, and head circumference. The 3rd, 5th, 10th, 25th, 50th, 75th, 90th, 95th and 97th percentile values were calculated for SPL measurements. The LMS method summarizes the changing distribution with three curves representing the mean, variability factor and distortion. These three curves are intersected in a non-cubic way using the maximum penalized likelihood method. A p-value less than 0.05 was accepted to be statistically significant
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