title: [Methodical and methodologic aspects of studies and evaluation of development in newborns and infants].
abstract: Relations between fetal age, age after birth (chronological) and absolute age are presented. The need to use absolute age instead of obstetric age categories, while assessing the developmental state of neonates and infants is shown. An analysis of data on 2,237 male newborns and 2,423 female newborns revealed relationships between body mass and fetal age. On the basis of regression analysis, various developmental tendencies in body mass of neonates are presented. Percentile charts of body mass applicable in assessment of developmental state and age of newborns at the age of 32-43 weeks are included as an appendix.
authors.affiliation: Zakład Biologii Rozwoju Człowieka Instytut Antropologii Uniwersytetu im. Adama Mickiewicza w Poznaniu.
authors.forename: M D
authors.initials: MD
authors.lastname: Kaliszewska-Drozdowska
mesh_terms: D000367:Age Factors; D001835:Body Weight / Q000502:physiology; D002657:Child Development / Q000502:physiology*; D005314:Embryonic and Fetal Development / Q000502:physiology; D005260:Female; D005865:Gestational Age; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D015997:Neonatal Screening / Q000379:methods*; D012044:Regression Analysis; D012107:Research Design