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85 Maternity and Obstetrics Group 3 and 4 (as the denominator): Single cephalic multiparous pregnancies at greater than or equal to 37 weeks gestation. Indications for induction of labour (Group 4a) 985/2679 (36.8%) Age Range Number % Body Mass Index Number % <20 0 0.0% Underweight: <18.5 157 10.0% 20 - 24 30 1.9% Healthy: 18.5 - 24.9 672 42.9% 25 - 29 158 10.1% Overweight: 25 - 29.9 478 30.5% 30 - 34 441 28.1% Obese class 1: 30 - 34.9 103 6.6% 35 - 39 735 46.9% Obese class 2: 35 - 39.9 44 2.8% >=40 203 13.0% Obese class 3: >40 16 1.0% Unrecorded 0 0.0% N/R 97 6.2% Total 1567 Total 1567 Birthweight Range Number % Labour Duration Number % 500 - 999 g 0 0.0% 0 - 2 hrs 997 63.6% 1000 - 1499 g 0 0.0% 2 - 4 hrs 288 18.4% 1,500 - 1,999 g 0 0.0% 4 - 6 hrs 132 8.4% 2,000 - 2,499 g 3 0.2% 6 - 8 hrs 40 2.6% 2,500 - 2,999 g 75 4.8% 8 - 10 hrs 12 0.8% 3,000 - 3,499 g 441 28.1% 10 - 12 hrs 3 0.2% 3,500 - 3,999 g 709 45.2% > 12 hrs 18 1.1% 4,000 - 4,499 g 286 18.3% Unrecorded 77 4.9% 4,500 - 4,999 g 50 3.2% Total 1567 >= 5,000 g 3 0.2% Total 1567 Group 3 and 4 (as the denominator): Single cephalic multiparous pregnancies at greater than or equal to 37 weeks gestation. Indications for induction of labour (Group 4a) 985/2679 (36.8%) Fetal 351/2679 12.7% Maternal 300/2679 11.2% SROM not in labour 120/2679 4.5% Postdates (>40 and less than 42 weeks) 71/2679 2.7% Postterm (>= 42 weeks) 62/2679 2.3% PET/Hypertension 43/2679 1.6% No medical indication 38/2679 1.4% Comment: The induction rate in single cephalic multiparous women without a previous caesarean section at term is 36.8%. This is high and a change of clinical practice partly at least as a result of changing epidemiological variables. The clinical impact in terms of other outcomes is less significant than in nulliparous women. NMH Annual Rep t | 2020