Demographic details of subjects with RFM.

Continuous data are presented as medians with range in parentheses.#One participant had estimated fetal weight th centile, abnormal umbilical artery Doppler and abnormal fetal heart rate trace.*Complications in pregnancy included oligohydramnios and gestational diabetes.**Poor pregnancy outcome defined as birthweight th centile, delivery before 37 weeks gestation or admission to the neonatal intensive care unit (NICU).†Differences between proportions tested using Fishers' exact test.