Summary
A study by researchers from Japan and the U.S. found that children born to mothers aged 35 and older are less likely to develop certain allergies in early childhood. The study analyzed data from nearly 35,000 children and showed lower rates of food allergies, wheezing, and sensitivity to allergens in these children compared to those born to younger mothers.
Key Facts
- Children of mothers aged 35 and older are less likely to have food allergies by age four.
- The study used data from the Japan Environment and Children's Study, covering over 100,000 pregnancies.
- 34,942 children were followed from birth to age four and assessed for allergic conditions.
- At one year old, 6.6% of children had a food allergy, lower for children of older mothers.
- Children of mothers aged 35+ were also less likely to experience wheezing by age one.
- The study accounted for factors like family allergy history, smoke exposure, and parental income.
- The researchers noted the study is observational and cannot prove cause and effect.
- Further research is needed to explore biological and social reasons for these findings.
