HealthDay News reports that iron supplementation in infancy improves gross motor development at age 9 months, according to research published online in Pediatrics.

The researchers found that iron supplementation in infancy, but not in pregnancy, was associated with improvements in gross motor scores.

The study supports the causal inference that iron supplementation in infancy, with or without iron supplementation in pregnancy, improved gross motor test scores at 9 months,” the authors write.