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Developmental Changes in Neonatal and Infant Skin Structures During the First 6 Months: In Vivo Observation

Yuki Miyauchi1, Yayoi Shimaoka2,3, Tsutomu Fujimura1

  • 1Biological Science Research, Kao Corporation, Ichikai, Haga, Tochigi, Japan.

Pediatric Dermatology
|March 4, 2016
PubMed

Insights

Infant skin undergoes significant structural development in the first three months after birth, with changes in thickness, dermal papillae formation, and microvasculature. This maturation parallels overall infant development.

Area of Science:

  • Dermatology
  • Developmental Biology
  • Neonatal Care

Background:

  • Neonatal and infant skin structure development requires further characterization.
  • Understanding these changes is crucial for assessing skin health and function in early life.

Purpose of the Study:

  • To investigate and clarify the in vivo developmental changes in skin structures of neonates and infants.
  • To document structural maturation from the neonatal period through the first six months of life.

Main Methods:

  • Utilized confocal laser scanning microscopy on skin samples from fifteen healthy, full-term neonates.
  • Measurements were taken at 4-7 days, 1, 3, and 6 months post-birth on buttock, thigh, and forearm.
  • Assessed dermoepidermal junction, stratum corneum thickness, epidermal thickness, and microvascular development.

Main Results:

  • Stratum corneum thickness significantly decreased within the first three months.
  • Dermal papillae emerged and developed gradually post-birth, correlating with increased epidermal thickness.
  • Complex neonatal microvasculature simplified, concentrating at dermal papillae by three months.

Conclusions:

  • Infant skin exhibits significant structural immaturity at birth, developing substantially within the first three months.
  • These structural changes are indicative of ongoing functional and developmental maturation of the skin.
  • The findings provide a baseline for understanding normal infant skin development.
Abstract

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