Toyama Regional Center for the Japan Environment and Children's Study, University of Toyama

Feelings upon learning of pregnancy, child developmental delays, and the role of social support

A nationwide birth cohort study found that negative feelings about pregnancy are associated with child developmental delays, while social support reduces risks. Mothers who reported 'no specific feelings' when learning of their pregnancy had the strongest association with developmental delays, highlighting the importance of identifying...

SourceToyama Regional Center for the Japan Environment and Children's Study, University of Toyama·JournalJournal of Health Psychology·TypeObservational study·DateSep 9, 2026

Study finds mixed associations between breastfeeding and childhood allergies

A study of 88,037 Japanese children found exclusive breastfeeding for 6 months associated with a higher prevalence of food allergy and atopic dermatitis. However, it also showed lower rates of bronchial asthma and allergic rhinoconjunctivitis.

SourceToyama Regional Center for the Japan Environment and Children's Study, University of Toyama·JournalBMC Pediatrics·TypeObservational study·DateJul 16, 2026

Mapping the risk factors for mother-infant bonding disorder

Researchers at University of Toyama found three risk factors for mother-infant bonding disorders: difficulty holding a fussy baby, low happiness about pregnancy, and lack of social support. These factors predict increased risks of developmental delays and child abuse.

SourceToyama Regional Center for the Japan Environment and Children's Study, University of Toyama·JournalArchives of Women s Mental Health·TypeObservational study·DateJun 30, 2026

Breast milk, best sleep: Nationwide Japanese study finds

A nationwide Japanese study of over 82,000 children found that exclusive breastfeeding for six months significantly reduces the risk of short sleep duration at one year of age. The study also suggests that breast milk's adaptability to infant needs and its melatonin content help regulate healthy sleep rhythms.

SourceToyama Regional Center for the Japan Environment and Children's Study, University of Toyama·JournalEuropean Journal of Clinical Nutrition·TypeObservational study·DateJun 26, 2026