400 Metres Result | 13th IAAF World Championships in Athletics

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

POS	BIB	ATHLETE	COUNTRY	MARK	Reaction Time
1	935	Allyson Felix	USA	50.36 Q	0.164
2	532	Novlene Williams-Mills	JAM	50.48 Q	0.364
3	768	Antonina Krivoshapka	RUS	50.55 q	0.214
4	892	Nataliia Pygyda	UKR	51.61	0.157
5	832	Moa Hjelmer	SWE	52.35	0.208
6	407	Nicola Sanders	GBR	52.47	0.187
7	332	Maris Mägi	EST	53.27	0.324
8	351	Fantu Magiso	ETH	53.41	0.387

POS	BIB	ATHLETE	COUNTRY	MARK	Reaction Time
1	959	Francena McCorory	USA	50.24 Q PB	0.210
2	531	Shericka Williams	JAM	50.46 Q SB	0.216
3	972	Sanya Richards-Ross	USA	50.66 q	0.209
4	503	Marta Milani	ITA	51.86 PB	0.181
5	166	Geisa Aparecida Coutinho	BRA	51.87	0.183
6	395	Lee McConnell	GBR	51.97	0.256
7	258	Norma González	COL	52.29	0.193
	910	Antonina Yefremova	UKR	DQ	0.164

POS	BIB	ATHLETE	COUNTRY	MARK	Reaction Time
1	163	Amantle Montsho	BOT	50.13 Q	0.368
2	529	Rosemarie Whyte	JAM	50.90	0.204
3	920	Jessica Beard	USA	51.27	0.267
4	795	Ndeye Fatou Soumah	SEN	52.10	0.300
5	300	Denisa Rosolová	CZE	52.53	0.166
6	1002	Racheal Nachula	ZAM	53.30 SB	0.209
	479	Joanne Cuddihy	IRL	DQ	-0.317
	760	Anastasiya Kapachinskaya	RUS	DQ	0.228