[Early determinants of obesity]

Area of Science:

• Pediatrics
• Public Health
• Developmental Biology

Background:

• Childhood obesity prevalence has surged, particularly in children under five.
• Early life factors, from prenatal to two years, influence long-term obesity risk.
• Maternal pre-pregnancy BMI, gestational weight gain, and smoking are linked to adult obesity.

Purpose of the Study:

• To review early life risk factors for childhood obesity.
• To identify key developmental periods and modifiable factors influencing obesity susceptibility.
• To explore potential mechanisms including genetics, epigenetics, and microbiota.

Main Methods:

• Literature review and meta-analysis synthesis.
• Analysis of epidemiological data on early life exposures and obesity outcomes.
• Examination of genetic, epigenetic, and microbiome research.

Main Results:

• Prenatal factors like maternal BMI, excessive gestational weight gain, smoking, and C-section delivery are associated with increased obesity risk.
• Rapid infant weight gain in early life is a strong predictor of adult obesity.
• Breastfeeding appears to have a limited association with obesity risk.

Conclusions:

• Early life interventions targeting prenatal and postnatal periods are crucial for combating childhood obesity.
• Understanding the interplay of genetics, epigenetics, and microbiota is key to deciphering obesity mechanisms.
• The rise in early life risk factors correlates with the increasing childhood obesity epidemic.