A study released on March 27, 2024, in the open-access journal PLOS ONE by Maria Bleil and her team from the University of Washington, USA, suggests that the earlier onset of puberty relative to peers of the same age may serve as a conduit through which risk factors encountered in childhood impact health related to the heart and metabolism in later life.
Childhood adverse conditions are often associated with deteriorating health outcomes during adulthood. Although many theoretical frameworks exist to explain how adverse childhood experiences might lead to changes that, while possibly beneficial in coping with immediate stress, pose long-term health risks, the role of puberty as a critical transitional phase bridging childhood and adulthood is often overlooked. This phase is particularly vulnerable to the child’s surrounding environment. Factors such as ethnicity (notably, Black and Latina girls tend to enter puberty earlier than White girls), the mother’s age at her first menstruation, rapid weight gain in infancy, obesity in childhood, socioeconomic challenges, strained parent-child relationships, and other stressful life events are commonly linked with an earlier start of puberty.
In their research, Bleil and her colleagues analyzed the timing of puberty and its health implications within a group of women who were part of the NICHD Study of Early Child Care and Youth Development. This longitudinal study tracked children and their families from birth through adolescence (1991-2009) and then again in adulthood from ages 26 to 31 (2018-2022), aiming to capture comprehensive social, behavioural, and health status data. Their analysis, which included data from 655 women, demonstrated that a delay in puberty (marked by later breast development, growth of pubic hair, and the first menstrual cycle) was associated with a reduced risk of cardiometabolic issues in adulthood. These puberty milestones also mediated the influence of various factors on adult cardiometabolic risk, including the mother’s age at first period, ethnicity, BMI percentile, and socioeconomic status during childhood.
While the study outlines predictive links between early-life risk factors, the timing of puberty, and cardiometabolic risks in adulthood, it stops short of establishing causality. Nonetheless, the findings provide robust longitudinal evidence supporting the critical role of puberty onset in the nexus between early-life exposures and cardiometabolic health later in life. The research suggests that interventions aimed at the timing of puberty could enhance health outcomes for girls at risk. The authors are hopeful that future research will not only corroborate these findings but also delve deeper into understanding the dynamics of the relationships they have highlighted.
In their own words, the study authors emphasize the significance of pubertal timing in females as a critical mechanism through which early-life risk factors, such as body mass index before puberty and socioeconomic standing, affect cardiometabolic health in later years. They argue that consideration and, where appropriate, intervention in pubertal development and timing could be crucial strategies to bolster cardiometabolic health.
More information: Maria E. Bleil et al, Pubertal timing: A life course pathway linking early life risk to adulthood cardiometabolic health, PLoS ONE. DOI: 10.1371/journal.pone.0299433
Journal information: PLoS ONE Provided by PLOS
