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.
Contents
Records
Prior to the competition, the existing world junior and championship records were as follows.
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.
References
2012 World Junior Championships in Athletics – Women's 4 × 400 metres relay Wikipedia(Text) CC BY-SA