400 Metres Summary | 11th IAAF World Championships in Athletics

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

POS	Rank	Heat	BIB	ATHLETE	COUNTRY	RESULTS
1	1	1	590	Novlene Williams-Mills	JAM	49.66 Q SB
2	1	2	474	Nicola Sanders	GBR	49.77 Q PB
3	2	2	793	Natalya Antyukh	RUS	49.93 Q SB
4	1	3	477	Christine Ohuruogu	GBR	50.16 Q PB
5	2	1	677	Ana Guevara	MEX	50.19 Q SB
6	2	3	1006	Mary Wineberg	USA	50.27 Q
7	3	2	1003	Deedee Trotter	USA	50.31 q
8	3	1	259	Ilona Usovich	BLR	50.31 q NR
9	4	2	592	Shericka Williams	JAM	50.37 SB
10	3	3	839	Tatyana Veshkurova	RUS	50.71
11	4	1	556	Joanne Cuddihy	IRL	50.73 NR
12	4	3	267	Amantle MONTSHO	BOT	50.90 NR
13	5	3	589	Shereefa Lloyd	JAM	51.00 PB
14	5	1	473	Lee McConnell	GBR	51.07 SB
15	6	1	362	Indira Terrero	CUB	51.08
16	5	2	229	Christine Amertil	BAH	51.18
17	7	1	968	Natasha Hastings	USA	51.45
18	6	3	703	Christy Ekpukhon Ihunaegbo	NGR	51.60
19	7	3	779	Ionela Târlea	ROU	51.62
20	8	1	609	Asami Chiba	JPN	51.81 SB
21	6	2	570	Daniela Reina	ITA	51.99 SB
22	7	2	542	Barbara Petráhn	HUN	52.12
23	8	2	535	Aliann Pompey	GUY	53.58
24	8	3	360	Aymeé Martínez	CUB	57.77

400 Metres women