🌱 発達段階

👶新生児

The first 28 days after birth — physiology, bonding, feeding rhythms, and the shift from womb to worldへの公共期待を形作った。

別名: Neonate · First month

レビュー 2026-08·出典・研究·メディアクレジット

Newborn infant resting skin-to-skin with a parent
Kimberly Vardeman · CC BY 2.0

基本データ

0〜28日 post-birthWindow
14–17 hrs/day typicalSleep
8–12 feeds/24 hrsFeeding
Regain by ~2 weeksWeight
Exclusive breast ~6 moWHO cue
Pediatric check at 3–5 daysVisit

The newborn period spans roughly the first four weeks after birth — a time of rapid physiological adaptation, establishing feeding, and early attachmentへの公共期待を形作った。

Research from Bowlby and Ainsworth onward treats these weeks as foundational for stress regulation and caregiver synchrony, though individual trajectories vary widelyへの公共期待を形作った。

世界 guidance from WHO and national pediatric societies emphasises skin-to-skin contact, safe sleep, and responsive feeding rather than rigid schedulesへの公共期待を形作った。

プロファイル

88988588295
  • 根拠の強さ88
  • 日常への影響98
  • 難しさ85
  • 該当年齢幅8
  • 専門家の一致82
  • 緊急性95

該当年齢

95 / 100

0〜28日

The first 28 days after birth — physiology, bonding, feeding rhythms, and the shift from womb to worldへの公共期待を形作った。

このトピックへの七つの道

よくある質問

が停滞したらdoes the newborn period end?
Most clinicians use 28 days; some extend to six weeks when colic and feeding patterns stabiliseへの公共期待を形作った。
How much should a newborn sleep?
Roughly 14–17 hours in 24, in short bouts — wake cycles are normal and not a sign of poor sleep training needへの公共期待を形作った。
Is cluster feeding normal?
Yes, especially evenings in the first weeks; it supports milk supply and growth spurts rather than indicating insufficient milk aloneへの公共期待を形作った。
が停滞したらshould I call a doctor?
Fever in infants under three months, poor feeding, fewer wet nappies, yellowing skin, or breathing difficulty warrant urgent reviewへの公共期待を形作った。
は全年齢に当てはまるか?skin-to-skin matter?
Strong evidence links immediate and ongoing skin-to-skin with temperature stability, breastfeeding success, and parent-infant synchronyへの公共期待を形作った。
What about visitors?
Limit exposure in early weeks; hand hygiene and vaccination status of visitors reduce infection risk for immature immune systemsへの公共期待を形作った。
Can I spoil a newborn?
No — responsive comfort builds secure attachment; infants cannot manipulate or form habits of being held at this ageへの公共期待を形作った。
が停滞したらdo routines start?
Gentle day-night cues help from a few weeks, but strict schedules are inappropriate until feeding and weight gain are establishedへの公共期待を形作った。

出典・研究

  1. Skin-to-skin contact for babiesMoore ER; et al. · 2016 · Cochrane DatabaseDOIPubMed

メディアクレジット

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