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Biologically normal sleep in the mother-infant dyad
Alanna E F Rudzik1, Helen L Ball2
1Department of Anthropology, State University of New York College at Oneonta, Oneonta, New York, USA.
Summary
New parents often misperceive infant sleep duration and location, with formula-feeding mothers showing greater inaccuracies. Evolutionary and biological infant sleep perspectives are gaining traction.
Area of Science:
- Maternal and Child Health
- Developmental Psychology
- Sleep Science
Background:
- Infant sleep norms are influenced by evolutionary, cultural, and statistical perspectives, shaping parental ideals and practices.
- Societal norms and clinical discourses often reinforce specific beliefs about
- normal
- infant sleep.
Purpose of the Study:
- To examine how different perspectives on infant sleep influence new parents' ideals and practices.
- To compare objective sleep data with maternal reports and assess concordance with public health guidance.
- To explore the influence of feeding method (exclusively breastfeeding vs. formula-feeding) on sleep reporting accuracy.
Main Methods:
- The "Sleeping Like a Baby" study collected sleep data from 4 to 18 weeks postpartum using actigraphy and maternal reports.
- Data were collected bi-weekly for exclusively breastfeeding (EBF) and formula-feeding (EFF) mother-infant dyads.
- Mothers also reported their infant sleep ideals and practices regarding duration, location, and co-sleeping.
Main Results:
- Mothers consistently overestimated infant sleep duration compared to actigraphy, with EFF mothers' reports being significantly less accurate.
- Maternal reports of sleep increases after room-sharing changes were not supported by objective actigraphy data.
- Concordance with public health guidance on sleep location varied, with bedsharing common in EBF dyads and room-sharing alone in EFF dyads.
Conclusions:
- Parental beliefs about "normal" infant sleep significantly shape their perceptions and practices.
- Clinical and scientific discourses can perpetuate societal norms regarding infant sleep.
- Evolutionary and biological perspectives on infant sleep are increasingly influencing parents and health practitioners.
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