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Table 3 Birthweight percentiles for male liveborn twins, Australia, 2001-2010

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

Gestation (weeks)

No. of births

Mean (g)

Standard deviation

Birthweight percentile (g)

p3

p5

p10

p25

p50

p75

p90

p95

p97

20

42

338

50

.

.

.

300

340

369

.

.

.

21

90

402

73

.

.

320

355

400

450

495

.

.

22

131

495

72

320

350

400

450

510

540

580

600

620

23

166

560

77

400

440

470

505

560

610

650

695

718

24

216

666

96

477

490

525

617

673

724

784

820

840

25

234

760

114

510

540

610

695

760

840

900

940

968

26

297

883

161

555

610

686

775

880

986

1080

1156

1205

27

323

1010

161

616

716

804

912

1019

1116

1200

1270

1300

28

478

1153

201

720

780

890

1030

1160

1290

1410

1450

1505

29

563

1297

219

757

875

1000

1180

1327

1450

1545

1625

1660

30

720

1453

246

930

991

1128

1314

1477

1600

1755

1850

1928

31

1059

1628

255

1120

1172

1285

1470

1632

1790

1942

2060

2120

32

1638

1784

292

1180

1275

1400

1596

1799

1972

2155

2245

2316

33

2040

1999

304

1410

1469

1590

1815

2010

2200

2370

2486

2555

34

3408

2179

328

1530

1618

1760

1970

2180

2400

2600

2704

2780

35

4503

2382

340

1755

1830

1950

2155

2380

2600

2810

2950

3040

36

7319

2589

359

1910

1995

2135

2350

2595

2820

3044

3185

3280

37

10665

2768

355

2100

2190

2315

2530

2765

3000

3215

3356

3470

38

7601

2901

357

2240

2320

2450

2665

2894

3130

3365

3510

3620

39

1129

2982

364

2260

2415

2538

2730

2980

3220

3460

3600

3695

40

308

3031

427

2275

2330

2470

2743

3040

3275

3600

3790

3960

41

25

3199

558

.

.

.

2805

3015

3500

.

.

.

42

8

2969

459

.

.

.

2500

2980

3400

.

.

.