Table 3 Trends in indications for induction of labour 2001–2020

Prolonged pregnancy

74,509 (27.0%)

9,422 (40.6%)

9,213 (41.0%)

9,798 (41.0%)

10,071 (39.9%)

8,449 (33.5%)

7,157 (27.1%)

6,501 (23.1%)

5,468 (17.7%)

4,392 (12.6%)

4,038 (11.2%)

Diabetes

25,928 (9.4%)

806 (3.5%)

870 (3.9%)

1,208 (5.1%)

1,628 (6.4%)

1,743 (6.9%)

2,248 (8.5%)

2,952 (10.5%)

4,205 (13.6%)

5,084 (14.6%)

5,184 (14.4%)

Reduced fetal movements

10,418 (3.8%)

299 (1.3%)

317 (1.4%)

315 (1.3%)

232 (0.9%)

196 (0.8%)

377 (1.4%)

668 (2.4%)

1,298 (4.2%)

3,149 (9.0%)

3,567 (9.9%)

Hypertension

26,183 (9.5%)

2,931 (12.6%)

2,709 (12.0%)

2,576 (10.8%)

2,578 (10.2%)

2,480 (9.8%)

2,510 (9.5%)

2,504 (8.9%)

2,606 (8.4%)

2,712 (7.8%)

2,577 (7.2%)

TPROM

28,738 (10.4%)

2,690 (11.6%)

2,577 (11.5%)

2,522 (10.5%)

2,979 (11.8%)

3,067 (12.2%)

3,016 (11.4%)

3,126 (11.1%)

3,057 (9.9%)

2,914 (8.3%)

2,790 (7.8%)

Large for gestational age

11,456 (4.1%)

418 (1.8%)

415 (1.8%)

488 (2.0%)

541 (2.1%)

532 (2.1%)

674 (2.5%)

789 (2.8%)

1,458 (4.7%)

2,730 (7.8%)

3,411 (9.5%)

Small for gestational age

13,911 (5.0%)

913 (3.9%)

831 (3.7%)

847 (3.5%)

814 (3.2%)

997 (4.0%)

1,174 (4.4%)

1,459 (5.2%)

1,985 (6.4%)

2,467 (7.1%)

2,424 (6.7%)

Non obstetric medical

7,449 (2.7%)

562 (2.4%)

510 (2.3%)

544 (2.3%)

600 (2.4%)

764 (3.0%)

622 (2.4%)

746 (2.7%)

793 (2.6%)

1,140 (3.3%)

1,168 (3.2%)

Obstetric medical

14,435 (5.2%)

1,030 (4.4%)

1,070 (4.8%)

1,230 (5.1%)

1,298 (5.1%)

1,208 (4.8%)

1,420 (5.4%)

1,567 (5.6%)

1,807 (5.8%)

1,928 (5.5%)

1,877 (5.2%)

Labour complication

6,168 (2.2%)

650 (2.8%)

345 (1.5%)

307 (1.3%)

355 (1.4%)

781 (3.1%)

542 (2.1%)

637 (2.3%)

770 (2.5%)

912 (2.6%)

869 (2.4%)

Fetal indication

8,775 (3.2%)

567 (2.4%)

440 (2.0%)

500 (2.1%)

571 (2.3%)

664 (2.6%)

885 (3.3%)

1,151 (4.1%)

1,292 (4.2%)

1,337 (3.8%)

1,368 (3.8%)

Advanced maternal age

5,103 (1.8%)

148 (0.6%)

110 (0.5%)

142 (0.6%)

165 (0.7%)

188 (0.7%)

218 (0.8%)

509 (1.8%)

976 (3.2%)

1,335 (3.8%)

1,312 (3.6%)

Elective IOL

42,829 (15.5%)

2,786 (12.0%)

3,052 (13.6%)

3,408 (14.3%)

3,332 (13.2%)

4,042 (16.0%)

5,483 (20.7%)

5,382 (19.1%)

5,114 (16.5%)

4,782 (13.7%)

5,448 (15.2%)

Psychosocial

648 (0.2%)

56 (0.2%)

57 (0.3%)

70 (0.3%)

90 (0.4%)

81 (0.3%)

73 (0.3%)

64 (0.2%)

29 (0.1%)

58 (0.2%)

70 (0.2%)

36,259 (7.7%)

3,603 (8.7%)

3,604 (8.6%)

3,755 (8.2%)

4,142 (8.4%)

4,192 (8.5%)

4,187 (8.5%)

3,867 (7.8%)

3,440 (7.0%)

2,850 (6.0%)

2,619 (5.8%)