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The Nomogram of Penile Length and Circumference in Iranian Term and Preterm Neonates Publisher



Soheilipour F1 ; Rohani F1 ; Dehkordi EH2 ; Tafreshi RI3 ; Mohagheghi P3 ; Zaheriani SM4 ; Jesmi F5 ; Salehiniya H6, 7
Authors
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Authors Affiliations
  1. 1. Pediatric Growth and Development Research Center, Institute of Endocrinology and Metabolism, Iran University of Medical Science, Tehran, Iran
  2. 2. Child Growth and Development Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Department of Pediatrics, Iran University of Medical Sciences, Tehran, Iran
  4. 4. Minimally Invasive Surgery Research Center, Iran University of Medical Sciences, Tehran, Iran
  5. 5. Pars Advanced and Minimally Invasive Medical Manners Research Center, Pars Hospital, Iran University of Medical Sciences, Tehran, Iran
  6. 6. Zabol University of Medical Sciences, Zabol, Iran
  7. 7. Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran

Source: Frontiers in Endocrinology Published:2018


Abstract

Background and objectives: The normal length of penis in preterm and term neonates is different among different nations, and is affected by various factors. The present study aimed to determine stretched penile length (SPL) values and cutoff level of micropenis in term and preterm Iranian neonates, for the first time. Materials and methods: All male neonates born in two general hospitals of Tehran (Akbarabadi, and Rasoul hospitals), center of Iran, with gestational age of 28-42 weeks were included and their SPL and penile circumference (PC) were examined on the first 3 days after birth by the same physician. Birth weight (BW), and height, gestational age, type of delivery, mother's age, twin/multiple pregnancy, drug, and medical history of mother during pregnancy were recorded and cutoff levels of two variables were calculated based on the collected variables for different gestational ages. Results: Among a total of 587 neonates, 203 neonates were born term and 384 preterm. Mean ± SD of neonates' BW were 2,682.51 ± 739.30 (850-4800) gr. Mean ± SD of their SPL was 22.48 ± 3.34 mm; 25.92 ± 1.54 mm in term and 20.66 ± 2.50 mm in preterm infants (P = 0.001). Mean ± SD of PC was 6.71 ± 1.31 mm; 8.14 ± 0.48 in term and 5.96 ± 0.92 in preterm infants (P = 0.001). SPL and PC were significantly correlated with type of delivery, number of parity, gestational age, BW, and crown-heel length, head circumference (P < 0.001). Conclusion: This study suggested that SPL in male neonates was 22.48 mm and PC was 6.71 mm, both correlated with gestational age and BW. Due to the ethnical variety of this cutoff points and lack of an appropriate study in Iran, these cutoff points can be used by all physicians as a reference for Iranian newborns (term and preterm), in order to prevent misdiagnosis of micropenis and genital disorders. © 2018 Soheilipour, Rohani, Dehkordi, Isa Tafreshi, Mohagheghi, Zaheriani, Jesmi and Salehiniya.
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1. The Nomogram of Clitoral Length and Width in Iranian Term and Preterm Neonates, Frontiers in Endocrinology (2020)