First 2 in each heat (Q) and the next 2 fastest (q)

POS Rank Heat BIB ATHLETE COUNTRY RESULTS
3 1 768 Antonina Krivoshapka RUSRUS 50.55 q
6 1 407 Nicola Sanders GBRGBR 52.47
5 2 166 Geisa Aparecida Coutinho BRABRA 51.87
2 3 529 Rosemarie Whyte JAMJAM 50.90
2 2 531 Shericka Williams JAMJAM 50.46 Q SB
4 1 892 Nataliia Pygyda UKRUKR 51.61
5 1 832 Moa Hjelmer SWESWE 52.35
3 479 Joanne Cuddihy IRLIRL DQ
6 2 395 Lee McConnell GBRGBR 51.97
2 910 Antonina Yefremova UKRUKR DQ
3 3 920 Jessica Beard USAUSA 51.27
7 1 332 Maris Mägi ESTEST 53.27
6 3 1002 Racheal Nachula ZAMZAM 53.30 SB
1 1 935 Allyson Felix USAUSA 50.36 Q
3 760 Anastasiya Kapachinskaya RUSRUS DQ
1 2 959 Francena McCorory USAUSA 50.24 Q PB
5 3 300 Denisa Rosolová CZECZE 52.53
1 3 163 Amantle Montsho BOTBOT 50.13 Q
7 2 258 Norma González COLCOL 52.29
4 3 795 Ndeye Fatou Soumah SENSEN 52.10
3 2 972 Sanya Richards-Ross USAUSA 50.66 q
4 2 503 Marta Milani ITAITA 51.86 PB
8 1 351 Fantu Magiso ETHETH 53.41
2 1 532 Novlene Williams-Mills JAMJAM 50.48 Q
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