Perinatal outcomes following mid trimester detection of isolated short foetal femur length

AbstractBackground: Short foetal femur length (FL) is a normal variant but may also be a marker for disorders such as skeletal dysplasia, Trisomy 21 (T21), Turners syndrome, congenital infection (TORCH) and foetal growth restriction (FGR).Aim: Our aim was to review outcomes in our population following a diagnosis of isolated short FL (FL <5th centile) when detected at the time of mid trimester foetal anomaly scan (FAS).Methods: All women within NHS Tayside who attended for routine mid trimester foetal anomaly scan at 18–21 weeks gestation (Range = 18+2–21+3 weeks) between November 2011 and June 2016 were included. Those who had an isolated FL <5th centile were identified using Viewpoint. Data relating to perinatal and childhood outcomes were obtained from local databases.Results: 72 women were identified. The median maternal age was 30 years (range = 17–45 years). 39/72 (54.2%) women were primigravid. 41/72 (56.9%) women had Down’s syndrome screening (DSS). 12/72 (16.7%) women were offered TORCH screens, ...