There is no consistent result in the relationship between obesity and timing of pubertal onset in boys .
Obesity may contribute to early onset of puberty in girls , while in boys , there is insufficient data .
This systematic review and meta- analysis examined the associations between obesity and puberty timing based on scientific evidence .
Earlier age at menarche in girls with rapid early life growth: cohort and within sibling analyses.
PURPOSE The purpose of the article was to examine the association of early life growth with age at menarche . METHODS Using data from a prospect i ve birth cohort ( n = 1134 women , 290 sibling sets ) , we assessed the association between postnatal growth at 4 months , 1 year , and 4 years and age at menarche , using generalized estimating equations and generalized linear r and om effects models . RESULTS Overall , 18 % of the cohort experienced early menarche ( < 12 years ) . After accounting for postnatal growth in length , faster postnatal change in weight ( per 10-percentile increase ) in all three periods was associated with an increase ( range 9%-20 % ) in the likelihood of having an early menarche . In adjusted linear models , faster weight gains in infancy and childhood were associated with an average age at menarche that was 1.1 - 1.3 months earlier compared with stable growth . The overall results were consistent for percentile and conditional growth models . Girls who experienced rapid growth ( defined as increasing across two major Centers for Disease Control and Prevention growth percentiles ) in early infancy had an average age at menarche that was 4.6 months earlier than girls whose growth was stable . CONCLUSIONS Faster postnatal weight gains in infancy and early childhood before the age of 4 years are associated with earlier age at menarche
There is no consistent result in the relationship between obesity and timing of pubertal onset in boys .
Obesity may contribute to early onset of puberty in girls , while in boys , there is insufficient data .
This systematic review and meta- analysis examined the associations between obesity and puberty timing based on scientific evidence .