Associations between birth characteristics, pubertal timing and adult height

Area of Science:

• Pediatric endocrinology
• Human growth and development
• Reproductive health

Background:

• Understanding factors influencing pubertal timing and adult height is crucial for pediatric health.
• Birth characteristics, including gestational age and size, are potential early indicators of later growth trajectories.
• Previous research has yielded mixed results on the precise associations between prenatal factors and post-natal growth outcomes.

Purpose of the Study:

• To investigate the relationship between gestational age and birth size (length and weight) with pubertal timing (age at peak height velocity) and adult height.
• To determine the predictive value of early growth parameters on final adult stature.
• To clarify the influence of prenatal factors on adolescent development and final height.

Main Methods:

• Retrospective, population-based study utilizing data from the GrowUp Gothenburg cohorts (n=4700).
• Inclusion of healthy individuals of Nordic ethnicity with recorded birth characteristics and adult heights.
• Statistical analysis using univariable linear regression and bivariate correlations to assess associations.

Main Results:

• Gestational age showed no significant association with age at peak height velocity or adult height.
• Birth length and birth weight explained 12% and 8% of the variance in adult height, respectively (p≤0.001).
• Birth size demonstrated only a minor explanatory power for the variation in age at peak height velocity.

Conclusions:

• Gestational age is not a determinant of pubertal timing or adult height.
• Birth size, particularly birth length, is positively associated with achieving greater adult height.
• The association between birth size and the timing of puberty (peak height velocity) is weak.