Fig 1. Maternal height categories among 192,432 Swedish women and the odds of having an infant born preterm (<37 weeks of gestation), very preterm (<32 weeks of gestation), or extremely preterm (<28 weeks of gestation).

Data are odds ratios and 95% confidence intervals, adjusted for maternal factors (age, maternal gestational age, BMI, and smoking during pregnancy), as well as fetal sex. The reference group are mothers with heights between -0.5 and +0.5 standard deviation scores (SDS) around the study population mean. Short stature indicates height ≤-2.0 SDS, and tall stature height ≥2.0 SDS.