Fig. 4

Birthweights by maternal age (a), parity (b), mode of delivery (c), and mode of birth induction (d) in 1999–2008. Birthweights in grams, shaded areas represent 95% confidence bands. Estimated marginal means for singleton term deliveries with the following characteristics: 48% female newborns, 47% primiparas, 76% vaginal deliveries, 85% non-induced deliveries, maternal age 28.0 years, gestational age at delivery 39.2 weeks. See further details on the modelling approach in the Statistical Analysis section