Minipuberty of Infancy and the Timing of Pubertal Development in Adolescence: a Follow-up of the Infant Feeding and Early Development (IFED) Cohort
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Puberty
- Sponsor
- National Institute of Environmental Health Sciences (NIEHS)
- Enrollment
- 566
- Locations
- 2
- Primary Endpoint
- To assess whether growth, timing of pubertal development, and hypothalamic-pituitary-gonadal (HPG) axis activity in childhood and adolescence are related to endogenous and exogenous endocrine-related factors during minipuberty of infancy.
- Status
- Enrolling By Invitation
- Last Updated
- 4 months ago
Overview
Brief Summary
Background:
Earlier puberty is associated with adverse health throughout a person s life. The average age when puberty begins has been declining over the past decades in girls, and may also be declining in boys. The reasons for this shift are unknown.
Objective:
To determine whether internal (physical, hormonal) or external (feeding, environment) factors during infancy affect growth and the timing of puberty.
Eligibility:
Mothers (or other parent/guardian) and their children who completed the Infant Feeding and Early Development (IFED) study.
Design:
Participants will complete all activities at home for this natural history study.
Participant mothers will fill out two 15-minute questionnaires:
- One will be about themselves. They will answer questions about their body size in childhood, their puberty, and their pregnancies.
- The other will be about their child. They will answer questions about their child s puberty and lifestyle.
Child participants will fill out a questionnaire about their body changes during puberty. This will take 10 minutes.
Participants will be sent an electronic scale and a measuring tape. They will measure the child s weight, height, and waist and hip circumference. These numbers can be submitted online or by phone or mail.
Participants will receive a kit for collecting urine samples. Child participants will collect urine in a cup upon waking 4 days in a row. A special filter card is dipped in the cup then hung to dry. The dried cards will be mailed back.
Participants will allow researchers to access their child s medical records.
Questionnaires and body measurements will be repeated after 6 and 12 months. Urine sample collection will be repeated after 12 months.
All questionnaires can be done either online, by mail, or by phone on request.
Detailed Description
Study Description: Our overarching hypothesis is that endogenous and exogenous factors related to hypothalamic-pituitary-gonadal (HPG) axis activity during minipuberty of infancy are associated with childhood growth, the timing of pubertal development, and HPG axis activity in adolescence. To examine this hypothesis, we will conduct an observational follow-up study of children previously enrolled as infants in the Infant Feeding and Early Development (IFED) cohort. This follow-up study will be conducted remotely with data collection via email/online, mail and telephone by contractors at DLH, working on behalf of NIEHS. Objectives: Primary Objective: To assess whether endogenous (e.g. hormone concentrations and size of hormone-sensitive organs) and exogenous (e.g. infant feeding method, exposure to endocrine disrupting chemicals) factors during minipuberty of infancy are related to a) growth, b) timing of pubertal development, and c) HPG axis activity in adolescence. Endpoints: Primary Endpoints: 1. Height, weight and body mass index (BMI) 2. Onset of breast, pubic hair and/or genital development 3. Urinary metabolites of reproductive hormones (e.g. gonadotropins and sex steroids)
Investigators
Eligibility Criteria
Inclusion Criteria
- Not provided
Exclusion Criteria
- Not provided
Outcomes
Primary Outcomes
To assess whether growth, timing of pubertal development, and hypothalamic-pituitary-gonadal (HPG) axis activity in childhood and adolescence are related to endogenous and exogenous endocrine-related factors during minipuberty of infancy.
Time Frame: Various time points in childhood/adolescence (study enrollment, 6-month and 12-month follow-up visits currently planned). We anticipate that children will be 8-12 years of age at enrollment (2022) and followed prospectively.
1)Growth in height, weight and body mass index 2)Onset of pubic hair development, breast development (females), genital development (males) 3)Urinary concentrations of reproductive hormone metabolites (e.g., gonadotropins, estradiol, testosterone)