Related Experiment Video
Updated: Jun 5, 2026

Quantified Assessment of Infant's Gross Motor Abilities Using a Multisensor Wearable
Published on: May 17, 2024
[Longitudinal study of the physical catch-up growth in 84 preterm appropriate for gestational age infants]
Mei-Ling Tong1, Min Zhang, Xia Chi
1Department of Child Health, Maternal and Child Health Hospital, Nanjing Medical University, Nanjing 210004, China. kt99cn@yahoo.com.cn
Insights
Preterm infants show catch-up growth in weight, length, and head circumference during their first year. The most rapid growth occurs in the first three months, with weight catch-up exceeding length catch-up.
Area of Science:
- Neonatology
- Pediatric Growth and Development
- Perinatology
Context:
- Preterm infants, appropriate for gestational age (AGA), exhibit unique growth patterns post-birth.
- Understanding catch-up growth is crucial for optimizing long-term health outcomes in this population.
Purpose:
- To investigate the physical catch-up growth characteristics and growth rhythm in preterm AGA infants.
- To analyze the velocity and patterns of weight, length, and head circumference catch-up growth.
Summary:
- Eighty-four preterm AGA newborns (gestational age 28-36 weeks) were monitored for weight, length, and head circumference using Z-scores.
- Results indicate significant catch-up growth in all measured parameters within the first year.
- The highest growth velocity was observed in the first three months, with weight catch-up surpassing length catch-up.
Impact:
- Identifies the critical early period for catch-up growth in preterm infants.
- Highlights the differential rates of catch-up growth in weight versus length, informing targeted nutritional and developmental support.
- Provides essential data for pediatricians and neonatologists managing preterm infant care.
Objective:
To study the growth rhythm of preterm appropriate for gestational age (AGA) infants by investigating their physical catch-up growth characteristics.
Methods:
Eighty-four preterm AGA newborns (44 males and 40 females) with gestational ages between 28-36 weeks were enrolled. The weight, length and head circumference were evaluated by Z score according to the criterions of actual and corrected ages.
Results:
The preterm infants had the catch-up growth in weight, length and head circumference in the first year of life. The growth velocity within the first three months was the highest. The velocity in the weight catch-up was higher than that in the length.
Conclusions:
The fastest growing period is the early three month of life in preterm AGA infants. The catch-up growth in weight and length is unbalanced.
Related Concept Videos
Longitudinal Research
Longitudinal Studies
Regression Toward the Mean
