Australian national birthweight percentiles by sex and gestational age for twins, 2001–2010

BMC Pediatrics

Table 4 Birthweight percentiles for female liveborn twins, Australia, 2001-2010

Gestation (weeks)	No. of births	Mean (g)	Standard deviation	Birthweight percentile (g)
Gestation (weeks)	No. of births	Mean (g)	Standard deviation	p3	p5	p10	p25	p50	p75	p90	p95	p97
20	49	299	57	.	.	.	260	296	330	.	.	.
21	94	374	58	.	.	300	340	370	415	450	.	.
22	107	459	75	300	330	350	420	460	508	545	570	580
23	143	517	83	325	350	405	470	520	570	620	640	650
24	176	635	87	425	480	530	589	638	700	731	751	780
25	167	728	113	520	547	580	656	730	800	878	907	920
26	241	845	141	525	580	660	760	864	930	1000	1052	1090
27	308	951	186	550	598	710	840	983	1060	1180	1240	1290
28	384	1090	169	745	795	870	991	1112	1200	1280	1345	1365
29	542	1219	211	750	808	930	1101	1235	1360	1465	1536	1601
30	697	1355	244	850	896	1010	1210	1375	1530	1655	1725	1760
31	990	1551	239	1030	1105	1227	1415	1568	1700	1833	1930	1990
32	1618	1713	262	1182	1248	1365	1550	1730	1880	2020	2140	2220
33	2037	1895	288	1320	1400	1530	1713	1900	2086	2250	2360	2430
34	3322	2085	308	1482	1555	1685	1885	2090	2292	2480	2570	2635
35	4558	2267	324	1640	1715	1850	2060	2270	2480	2670	2790	2875
36	7145	2464	339	1825	1905	2035	2240	2460	2680	2900	3030	3130
37	10695	2656	340	2020	2100	2225	2430	2650	2880	3090	3230	3326
38	7720	2774	339	2145	2230	2349	2545	2765	2990	3215	3350	3435
39	1154	2884	373	2185	2280	2420	2630	2875	3140	3360	3500	3570
40	320	2958	438	2110	2180	2368	2668	3000	3240	3518	3653	3800
41	22	2976	322	.	.	.	2795	2933	3220	.	.	.
42	11	3001	497	.	.	.	2540	2910	3440	.	.	.

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