Endocrine Abstracts (2009) 20 P637

Penile size and testicular volume in healthy Lithuanian newborns

Romualdas Tomas Preiksa, Birute Zilaitiene & Valentinas Matulevicius

Institute of Endocrinology, Kaunas University of Medicine, Kaunas, Lithuania.

Aim: Of the study was to establish normal penile size and testicular volume in healthy Lithuanian newborns.

Methods: Of 1204 newborn boys were examined in Panevėžys Hospital due to genitometry. Those with cryptorchidism or hypospadias were excluded. Penis size was measured in 1042 and testicular volume in 712 healthy newborns. The stretched penile length was measured between the pubic ramus and the tip of the glans and the diameter – in the midshaft of the penis. Testicular size was determined with Prader orchidometer.

Results: The mean penile length was 35.7±4.5 and lower and upper cut-offs (±2.5 S.D.) were 24.5–47.0 mm. The mean penile midshaft diameter was 12.3±1.0 mm (9.7–14.7 mm). Average testicular volume was 0.9±0.3 ml. Penile size, diameter and testicular volume correlated positively between each other and with born body length, weight and gestational age respectively.

Conclusion: Stretched penile length of Lithuanian healthy newborns corresponded to the reported international data. Neonatal penile diameter and testicular volume also represent intrauterine androgenisation.

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