Pubertal Timing During Early Adolescence: Advanced Pubertal Onset in Females with Autism Spectrum Disorder.
Autistic girls enter puberty about six months before their peers—start teaching body changes earlier.
01Research in Context
What this study did
Doctors tracked puberty start in 239 kids. Half had autism, half were neurotypical. They noted breast growth and first period in girls, testes size in boys.
Kids were 8-14 years old. Families visited every six months for two years. Doctors used standard growth charts to time puberty.
What they found
Autistic girls got their first period six months earlier than neurotypical girls. Breast budding started sooner too. Autistic boys showed no early change.
The shift only happened in girls with autism. It did not link to IQ or medicine use. Early puberty can raise anxiety and social stress.
How this fits with other research
Boets et al. (2011) seems to say the opposite. They found neurotypical girls with mild autistic traits started periods later, not earlier. The key gap: O studied traits in general kids; A et al. studied girls already diagnosed with autism. Different groups, different timing.
Lyall et al. (2011) adds a family clue. Mothers who had their own first period before age 10 were more likely to have a child with autism. The new data show the early-puberty pattern can appear in the daughters themselves.
Esteban-Figuerola et al. (2021) saw preschoolers with autism grow taller faster. Together these papers paint a picture: some kids with autism follow an accelerated body clock that starts in early childhood and peaks in early teen years.
Why it matters
If you work with autistic girls, move puberty education earlier. Teach body changes, hygiene, and mood rules before fifth grade. Watch for jumpy behavior or sleep drops that can tag early hormones. Share the timeline with parents so they can plan supplies and safety talks sooner.
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02At a glance
03Original abstract
Autism spectrum disorder (ASD) is characterized by impaired social communication and poor adaptation to change; thus, the onset of puberty may be a pivotal transition. This cross-sectional study measured pubertal timing to examine hypothesized differences for sex (female vs. male) and group (ASD vs. typical development [TD]). Participants included 239 children (137 ASD, 102 TD) between 10 and 13 years. The ASD group included 35 females and 102 males; the TDs included 44 females and 58 males. Pubertal onset measured by genital or pubic stage was investigated with linear regression using main effects of sex and age-by-sex interactions in TD and ASD groups and main effects of diagnosis and diagnosis-by-age interactions in males and females, controlling for body mass index, socioeconomic status, and race. In TD, examination of main effects for genital (penis/breast) stage showed no difference for male and female children (t = 1.33, P = 0.187, rdf = 92); however, there were significant differences in ASD (t = 2.70, P = 0.008, rdf = 121). For diagnosis modeled separately by sex, there was significantly earlier pubertal development in females with ASD (t = 1.97, P = 0.053, rdf = 70, but not males (t = 1.329, P = 0.186, rdf = 143). In addition, analysis of menses revealed females with ASD had significantly earlier onset than TD (t = -2.56, P = 0.018, rdf = 21). Examination of pubic stage revealed expected sex differences for TD (t = 2,674, P = 0.009, rdf = 91) and ASD (t = 3.482, P = 0.001, rdf = 121). Females with ASD evidence advanced pubertal onset relative to ASD males and TD females. Findings underscore the need for enhanced understanding of pubertal development in ASD, as differences may have significant psychological, social, physiological, and developmental consequences. LAY SUMMARY: Children with autism spectrum disorder (ASD) have difficulty with social communication and respond poorly to change, which may include the onset and course of puberty. The study measured the timing of puberty in 239 children (137 ASD and 102 typical development [TD]) between 10 and 13 years based on pubertal stage of genital (breast/penis) and pubic hair development. Females with ASD evidence advanced pubertal onset relative to ASD males and TD females. Findings underscore the need for an enhanced understanding of pubertal development in ASD.
Autism research : official journal of the International Society for Autism Research, 2020 · doi:10.3390/ijerph16162887