Normal Values of Stretched Penile Length According to Gestational Age in Neonates

Objective: To assess the mean stretched values of penile length and penile circumference according to gestational age in term neonates attending Combined Military Hospital, Rawalpindi, Pakistan. Study Design: Cross-sectional study. Place and Duration of Study: Combined Military Hospital, Rawalpindi Pakistan, from Jan 2022 to Jul 2022. Methodology: Male newborns born apparently healthy with in between 37 to 42 gestational weeks were enrolled within 3 days of birth. Measurements of stretched penile length and penile circumference were performed twice, and the average value of the two measurements was recorded. Results: Among 69 neonates, the average gestational age was 39.92±1.44 weeks. The mean stretched penile length was 3.15±0.47 cm, while the mean penile circumference was 1.01±1.30 cm. Significant differences were observed in birth length (p<0.001), head circumference (p<0.001), stretched penile length (p=0.006), and penile circumference (p=0.002) in relation to gestational age. A significant correlation was observed between stretched penile length and various factors, including gestational age (r 0.414, p<0.001), postnatal age (r 0.429, p<0.001), birth weight (r 0.582, p<0.001), birth length (r 0.398, p=0.001), and total serum testosterone (r 0.475, p<0.001). Similarly, penile circumference exhibited significant correlations with gestational age (r 0.470, p<0.001), birth weight (r 0.419, p<0.001), and birth length (r 0.563, p<0.001). Conclusion: In this study, a moderate positive significant relationship of gestational age was observed with both stretched penile length and penile circumference.