2012 World Junior Championships in Athletics – Women's 400 metres hurdles
The women's 400 metres hurdles at the 2012 World Junior Championships in Athletics was held at the Estadi Olímpic Lluís Companys on 12, 13, and 14 July.Medalists
Records
, the existing world junior and championship records were as follows.Results
Heats
Qualification: first 4 of each heat plus the 4 fastest times qualified
| Rank | Heat | Lane | Name | Nationality | Time | Note |
| 1 | 1 | 7 | Kübra Sesli | | 58.01 | Q |
| 2 | 2 | 8 | Olena Kolesnychenko | | 58.40 | Q |
| 3 | 1 | 2 | Vilde J. Svortevik | | 58.46 | Q, PB |
| 4 | 4 | 3 | Janieve Russell | | 58.57 | Q |
| 5 | 2 | 4 | Sage Watson | | 58.99 | Q, PB |
| 5 | 1 | 8 | Christine Salterberg | | 58.99 | Q |
| 7 | 1 | 9 | Eva Trošt | | 59.15 | Q, PB |
| 8 | 1 | 4 | Valentine Huze | | 59.20 | q, PB |
| 9 | 3 | 8 | Anastasiia Lebid | | 59.28 | Q |
| 10 | 4 | 4 | Agnieszka Karczmarczyk | | 59.31 | Q |
| 11 | 5 | 8 | Taylor Farquhar | | 59.38 | Q |
| 12 | 5 | 9 | Aurèlie Chaboudez | | 59.56 | Q |
| 13 | 4 | 9 | Tessa Consedine | | 59.66 | Q |
| 14 | 4 | 8 | Anna Ustinova | | 59.74 | Q |
| 15 | 2 | 9 | Kernesha Spann | | 59.84 | Q |
| 16 | 1 | 6 | Oona Hujanen | | 1:00.01 | q, PB |
| 17 | 2 | 7 | Kaila Barber | | 1:00.02 | Q |
| 18 | 3 | 5 | Sara Klein | | 1:00.06 | Q |
| 19 | 5 | 3 | Tasabih Mohamed El Sayed | | 1:00.13 | Q |
| 20 | 5 | 5 | Shamier Little | | 1:00.14 | Q |
| 21 | 2 | 6 | Effrosíni Theodórou | | 1:00.19 | q |
| 22 | 4 | 7 | Emel Sanli | | 1:00.56 | q |
| 23 | 5 | 6 | Marina Zaiko | | 1:00.63 | |
| 24 | 3 | 7 | Devinn Cartwright | | 1:00.72 | Q |
| 25 | 3 | 3 | Olga Vovk | | 1:00.73 | Q |
| 26 | 3 | 9 | Izelle Neuhoff | | 1:00.83 | |
| 27 | 1 | 5 | Ane Fourie | | 1:00.93 | |
| 28 | 5 | 7 | Minjia Cai | | 1:01.06 | |
| 29 | 4 | 6 | Pedrya Seymour | | 1:01.09 | |
| 30 | 4 | 5 | R. Anu | | 1:01.14 | |
| 31 | 2 | 3 | Nóra Zajovics | | 1:01.28 | |
| 32 | 2 | 5 | Thi Huyen Nguyen | | 1:02.01 | SB |
| 33 | 5 | 4 | Irina Asanova | | 1:02.04 | |
| 34 | 1 | 3 | Fanni Dániel | | 1:03.88 | |
| 35 | 3 | 6 | Abir Barkaoui | | 1:04.42 | |
| 36 | 2 | 2 | Alba Casanovas | | 1:10.26 | |
| 3 | 4 | Adekoya Kemi | | DNS | |
Semi-Final
Qualification: The first 2 of each heat and the 2 fastest times qualified
| Rank | Heat | Lane | Name | Nationality | Time | Note |
| 1 | 3 | 4 | Janieve Russell | | 57.23 | Q |
| 2 | 2 | 8 | Kaila Barber | | 57.29 | Q, PB |
| 3 | 2 | 7 | Vilde J. Svortevik | | 57.34 | Q, NJ |
| 4 | 1 | 5 | Olena Kolesnychenko | | 57.35 | Q, PB |
| 5 | 2 | 6 | Kübra Sesli | | 57.45 | q, NJ |
| 6 | 3 | 5 | Aurèlie Chaboudez | | 57.46 | Q, SB |
| 6 | 1 | 3 | Shamier Little | | 57.46 | Q |
| 8 | 1 | 4 | Taylor Farquhar | | 57.82 | q, PB |
| 9 | 1 | 6 | Christine Salterberg | | 57.96 | |
| 10 | 2 | 5 | Sage Watson | | 58.04 | PB |
| 11 | 3 | 7 | Anastasiia Lebid | | 58.13 | PB |
| 12 | 3 | 8 | Eva Trošt | | 58.60 | PB |
| 13 | 3 | 3 | Emel Sanli | | 58.82 | |
| 14 | 3 | 6 | Sara Klein | | 58.93 | |
| 15 | 1 | 2 | Valentine Huze | | 59.42 | |
| 16 | 2 | 4 | Tessa Consedine | | 59.75 | |
| 17 | 3 | 2 | Oona Hujanen | | 59.88 | PB |
| 18 | 1 | 7 | Agnieszka Karczmarczyk | | 59.94 | |
| 19 | 1 | 9 | Tasabih Mohamed El Sayed | | 59.95 | |
| 20 | 1 | 8 | Anna Ustinova | | 1:00.40 | |
| 21 | 2 | 9 | Kernesha Spann | | 1:00.63 | |
| 22 | 2 | 3 | Effrosíni Theodórou | | 1:00.91 | |
| 23 | 2 | 2 | Olga Vovk | | 1:00.97 | |
| 24 | 3 | 9 | Devinn Cartwright | | 1:03.88 | |
Final
Participation
According to an unofficial count, 36 athletes from 26 countries participated in the event.
