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Table 3 Pregnancy and labour/delivery characteristics of the AOB study participants

From: The All Our Babies pregnancy cohort: design, methods, and participant characteristics

Pregnancy intention (n=3355)  
Characteristic n(%)
Trying to get pregnant 2698 (80.4)
Not trying to get pregnant 657 (19.6)
Feelings about pregnancy (n=3348)  
Happy 2913 (87)
Unhappy/not sure 435 (13)
Gravidity (n=3338)  
Nulligravida 1192 (35.7)
Primi/Multigravida 2141 (64.3)
Parity (n=3340)  
Nulliparous 1637 (49)
Primi/Multiparous 1703 (51)
Weight gain during pregnancy a (n=3002)  
Inadequate 895 (29.8)
Adequate 1239 (41.3)
Excessive 868 (28.9)
Method of delivery (n=3055)  
Vaginal 2297 (75.2)
Caesarean section 758 (24.8)
Gestational age (n=3032)  
<34wks 51 (1.7)
34-36 wks 190 (6.2)
37+ wks 2791 (92.1)
Small for Gestational Age (singletons; n=2836)  
SGA 300 (10.6)
Not SGA 2536 (89.4)
Large for Gestational Age (singletons; n=2836)  
LGA 251 (8.9)
Not LGA 2585 (91.1)
Breastfeeding initiation (n=3057)  
Yes 2993 (97.9)
No 64 (2.1)
Exclusive breastfeeding at 1 wk (n=2969) b  
Yes 1786 (60.2)
No 1183 (39.8)
Exclusive breastfeeding at 4-months (n=2976) b  
Yes 1809 (60.8)
No 1167 (39.2)
  1. a Difference in weight between 34-36wks and pre-pregnancy
  2. b Among those who initiated breastfeeding