Mother-Baby Study - Observational

Study Overview
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Brief Summary
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The rate of weight gain in the first year of life is risk factor for future obesity. The study will test (1) a model of l mechanisms underlying the development of emotion, attachment, and nutritive intake; and (2) the association with maternal feeding behavior, child eating behavior, dietary intake, and adiposity.

Official Title
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Fundamental Biobehavioral Mechanisms Underlying the Integrated Development of Emotion, Attachment, and Nutritive Intake in the Mother-Infant Dyad

Conditions
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Obesity, Obesity, Childhood

Intervention / Treatment
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* Behavioral: Bonding-Evoked Oxytocin
* Behavioral: Distress Relieving Effects of Sucrose
* Behavioral: Hedonic Response to Sucrose
* Behavioral: Typical versus Challenging Feeding-Social
* Behavioral: Caloric Compensation-Social
* Behavioral: Ability to Delay Gratification for Food in Infants-Social Task (ATDG-FIT-Social)


Participation Criteria
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Eligibility Criteria
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To be eligible to participate in this study, they mother-child dyad must meet all of the following criteria: Provision of signed and dated informed consent form by mother for herself and infant Stated willingness by mother to comply with all study procedures and availability for the duration of the study Infant gestational age 37.0 - 42.0 weeks based on maternal report of due date and child's birth date Infant birth weight by maternal report appropriate (≥ 3rd percentile and ≤ 97th percentile) for gestational age and sex based on US Natality Data set. Mother is biological mother both genetically and gestationally by maternal report (i.e., conception with her own (versus donor) egg and she was pregnant (versus a surrogate) Biological mother is legal guardian by maternal report Biological mother is full time custodial guardian by maternal report (versus sharing custody such that infant does not live with her full time) Infant is the mother's first live birth (i.e., first born) by maternal report Infant has fed at least 2.0 ounces in one feeding from an artificial nipple and bottle by maternal report or mother reports planning to do prior to first task requiring artificial nipple and bottle during age 1.0 month data collection window Any dyad who meets any of the following criteria will be excluded from participation in this study: Limited English proficiency in the mother; this is necessary because the questionnaires have only been validated in English-speaking populations. Participation in another study involving treatment or intervention focused on mother or child emotion or attachment, child eating behavior, child dietary intake, or child growth Mother < 18.0 years old at time of consent prior to infant's age 1.0 month data collection window Significant medical problems in the child or known diagnosis as reported by the mother that has significant potential to affect current or future eating, growth or development in the child as evaluated by PI Lumeng (e.g., cystic fibrosis, cleft palate, trisomy 13). Significant medical problems in the mother as reported by the mother and assessed for significance by PI Lumeng (i.e., cancer, lupus) Mother or infant taking medications likely to have significant effect on biological measures in study (e.g., steroids) Family lives more than 1.5 hour driving distance from the University of Michigan. This is necessary to ensure study feasibility. Family plans to move outside 1.5 hour driving distance from the University of Michigan before end of age 36-month data collection window. This is necessary to ensure study feasibility. Child is product of multiple gestation (i.e., twins, triplets) Significant complications for mother or infant during the pregnancy as assessed by PI Lumeng (e.g., eclampsia, preterm premature rupture of membranes) Significant complications for mother or infant during the perinatal period as assessed by PI Lumeng (e.g., sepsis, hemorrhage requiring transfusion, persistent pulmonary hypertension of the newborn) All participants must be enrolled in all parts of the Mother-Baby study (1 Observational study and 4 Clinical Trials)

Ages Eligible for Study
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Minimum Age: 0 Days

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Mother-Infant Dyad<br>The researchers will enroll 120 infants and their mothers (120 dyads, 240 total participants). The researchers anticipate, based on prior experience and the slightly more restrictive inclusion and exclusion criteria in this study compared to our prior work, needing to screen about 600 mother-infant dyads to achieve the target sample size of 120. The researchers anticipate that the sample will be 63% non-Hispanic white, 13% non-Hispanic black, 4% non-Hispanic Asian, 12% non-Hispanic multiracial, and 8% Hispanic (any race). The researchers expect that 50% of the infants will be male and 50% female, and all of the biological mothers will be female sex. Infants will be 0.5-1.5 months at enrollment and the researchers estimate that mothers will be between 18.0 and 50.0 at enrollment (upper age limit is estimated due to menopause ). | Behavioral: Bonding-Evoked Oxytocin<br>* Mother participates in bonding activity with infant at ages 1, 3, and 6 months<br>Behavioral: Distress Relieving Effects of Sucrose<br>* Researcher elicits distress in the infant (sequence of unswaddling, pacifier removal, and arm restraint), followed by delivery of oral sucrose in one condition and water in other condition<br>Behavioral: Hedonic Response to Sucrose<br>* Researcher gives infant opportunity to suck from two bottles, one containing sucrose and one plain water at infant ages 1, 3, and 6 months<br>Behavioral: Typical versus Challenging Feeding-Social<br>* Mother feeds infant on four counterbalanced days at infant ages 1, 3, and 6 months crossing two conditions: (1) regular size nipple versus smaller aperture nipple ('challenging') and (2) providing social interaction while feeding versus not.<br>Behavioral: Caloric Compensation-Social<br>* Mother feeds infant on four counterbalanced days at infant ages 1, 3, and 6 months crossing two conditions: (1) offering a bottle feeding ad lib for 3 hours versus offering a bottle feeding every hour for 3 hours; (2) providing social interaction while feeding versus not.<br>Behavioral: Ability to Delay Gratification for Food in Infants-Social Task (ATDG-FIT-Social)<br>* When mother indicates infant is hungry, she presents the infant the bottle but withholds feeding for 5 minutes, feeds for one minute, withholds feeding for 30 seconds, and then resumes feeding. She does so under two conditions (providing social interaction during feeding versus not) on two counterbalanced days at infant ages 1, 3, and 6 months.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Weight-for-length z-score |  | Up to 36 months (infant age) | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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weight gain