Purpose: Previous studies suggest that hair products containing endocrine disrupting chemicals could alter puberty. We evaluated the association between childhood hair product use and age at menarche in a racially diverse study population.
Methods: We recruited 300 African-American, African-Caribbean, Hispanic, and white women from the New York City metropolitan area who were between 18-77 years of age. Data were collected retrospectively on hair oil, lotion, leave-in conditioner, perm, and other types of hair products used before age 13. Recalled age at menarche ranged from 8 to 19 years. We used multivariable binomial regression to evaluate the association between hair product use and age at menarche (<12 vs. ≥12), adjusting for potential confounders.
Results: African-Americans were more likely to use hair products and reached menarche earlier than other racial/ethnic groups. Women reporting childhood hair oil use had a risk ratio of 1.4 (95% confidence interval [CI]: 1.1-1.9) for earlier menarche, adjusting for race/ethnicity and year of birth. Hair perm users had an increased risk for earlier menarche (adjusted risk ratio = 1.4, 95% CI: 1.1-1.8). Other types of hair products assessed in this study were not associated with earlier menarche.
Conclusions: Childhood hair oil and perm use were associated with earlier menarche. If replicated, these results suggest that hair product use may be important to measure in evaluating earlier age at menarche.
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http://dx.doi.org/10.1016/j.annepidem.2011.01.009 | DOI Listing |
F S Rep
December 2024
Departments of Neurology, Division of Sleep Medicine, and Obstetrics & Gynecology, Michigan Medicine, Ann Arbor, Michigan.
Objective: Incorporate sleep into a novel lifestyle intervention strategy in adolescents with Emerging symptoms of polycystic ovary syndrome (E-PCOS).
Design: A single-center cohort study.
Setting: University hospital-based clinic for adolescents with PCOS.
Ann Pediatr Endocrinol Metab
December 2024
Metabolic Liver Disease Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.
Purpose: We compared the age at menarche and standard deviation score (SDS) of final height (FH) in permanent congenital hypothyroidism (CH) patients with those of healthy female adolescents and assessed their associations with CH screening-related variables or demographic factors.
Methods: In this cross-sectional study, we included 207 female CH patients and 598 healthy age-matched female adolescents. Ages at puberty onset and menarche, height at puberty and menarche, and the FH and its SDS were evaluated in the 2 groups and compared.
BMC Womens Health
January 2025
Centre for the Study of Regional Development, School of Social Sciences, Jawaharlal Nehru University, New Delhi, India.
Background: Menarche, a milestone in a woman's reproductive journey, is influenced by various factors such as lifestyle and dietary habits. Recent studies have corroborated this claim and prompted further investigation. This study explores the connection between menarche timing with lifestyle and dietary habits among three generations of women from the Sakaldiha block of Chandauli district and presents valuable insights into the role of diet and lifestyle in this crucial reproductive event.
View Article and Find Full Text PDFJ Clin Med
December 2024
Fertisuisse, Clinic for Reproductive Medicine, 4600 Olten, Switzerland.
: Adolescence is the period of life between the ages of 10 and 19. This period is essentially dominated by puberty. The first menstruation, called menarche, occurs, on average, at the age of 12-13.
View Article and Find Full Text PDFReproductive aging, including timing of menarche and menopause, influences long-term morbidity and mortality in women, yet underlying biological mechanisms remain poorly understood. Using DNA methylation-based biomarkers, we assessed associations of age at menarche (N=1,033) and menopause (N=658) with epigenetic aging in a nationally representative sample of women ≥50 years. Later age at menopause was associated with lower GrimAge epigenetic age deviation ( = -0.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!