2012 World Junior Championships in Athletics – Women's 4 × 400 metres relay
The women's 4 × 400 metres relay at the 2012 World Junior Championships in Athletics was held at the Estadi Olímpic Lluís Companys on 14 and 15 July 2012. Records. , the existing world junior and championship records were as follows. Results. Heats. Qualification: First 3 of each heat (Q) plus the 2 fastest times (q) qualified Participation. According to an unofficial count, 59 athletes from 13 countries participated in the event.