The Effects of Infant Child Care on Infant-Mother Attachment Security: Results of the NICHD Study of Early Child Care

Outcomes of pubertal development in girls as a function of pubertal onset age

“…We analyzed data of 380 girls from the SECCYD, which was collected from 1991 to 2006 (12,16,17). Specifically, our analysis used reported data from the onset age of puberty (Tanner stage B2 (thelarche)) and menarche age as indices of pubertal progression (B2 to menarche), tempo and growth.…”

“…Assuming that the timing and tempo of puberty are associated in a way that benefits reproductive strategy, we hypothesized that the onset age of puberty will predict pubertal progress and the growth tempo, but not the final adult height. We tested these hypotheses using data from the large cohort SECCYD (16).…”

Predicting pubertal development by infantile and childhood height, BMI, and adiposity rebound

“…We analyzed longitudinal data of the NICHD SECCYD (11) whose participants were recruited from 24 hospitals in the United States and whose recruitment and selection are described in detail in previous publications (11,25,26) and on the study's website http://secc.rti.org. Measurement and pubertal stage assessment were performed by the study network researchers.…”

“…Measurement and pubertal stage assessment were performed by the study network researchers. All study procedures were approved at the institutional reviews boards of each site, as previously reported (11), and parental informed consent was obtained for all participants.…”

“…To this end, we examined pubertal variability by assessing the effects of height, BMI, and AR at specific ages on the timing and duration of puberty. For this purpose, we utilized the anthropological measurements and pubertal staging data from American children of families that were recruited at 1 y of age in 1991 and followed up prospectively until 15.5 y of age for the National Institutes of Health (NICHD) Study of Early Child Care and Youth Development (SECCYD) (11).…”