Acknowledgements
The authors would like to thank all pregnant women who participated in the maternity screening program and their attending midwives and doctors. We are especially grateful to Mrs. Kate Brown and Mrs. Helen Diamandis, who facilitated the data collection for this study.
Conflicts of interest: The authors report no conflicts of interest.
Funding: No specific funding was received for this study.
Contribution of authorship: DLR, AR, MLG, KRP, AS, EMW and RJH conceptualized the study and implemented routine screening in antenatal clinic. TMK and RL were responsible for the laboratory tests. JR and DLR collected the data. DLR analysed the data and drafted the manuscript. All authors read and approved the final version of the manuscript.