A Danish study has found that infant girls whose mothers took paracetamol during pregnancy show measurable differences in ovarian size, follicle count, and reproductive hormone levels at three months of age — the first prospective human evidence that the world's most widely used pregnancy analgesic may touch the earliest architecture of female fertility. The findings, drawn from 302 infants and corroborated by a separate adolescent cohort, do not establish cause and effect, and whether these anatomical differences will carry any consequence into adulthood remains one of medicine's open questio