1. Ultrasound and Fetal Medicine Centre; Coombe Women and Infants University Hospital; Dublin Ireland
2. UCD Centre for Human Reproduction; Coombe Women and Infants University Hospital; Dublin Ireland
3. TCD Department of Paediatrics; Coombe Women and Infants University Hospital; Dublin Ireland
4. UCD Centre for Support and Training in Analysis and Research; University College Dublin; Belfield Dublin Ireland