Prenatal antibiotics safe

A Danish cohort study found the association may be underpinned by a maternal heritable predisposition to infection.

Researchers examined cases of childhood asthma through hospital admissions, outpatient attendance or use of inhaled corticosteroids in all liveborn children from 1997–2010.

During the period, there were 910,301 babies born from 891,555 unique pregnancies. In 32% of unique pregnancies, the mother had at least one antibiotic prescription filled.

Among their offspring, 0.85% fulfilled the criteria for recurrent inpatient hospital admissions for asthma; 1.5% had at least one year of