© 2002 Archives of Disease in Childhood Fetal and Neonatal Edition
SHORT REPORT
Follow up of fetal outcome in cases of maternal phenylketonuria in Northern Ireland
1 Regional Genetics Service, Belfast City Hospital Trust, Lisburn Road, Belfast BT9 7AB, Northern Ireland, UK
2 Department of Clinical Biochemistry, Royal Group of Hospitals Trust, Falls Road, Belfast BT12 6BE
3 Department of Dietetics, Royal Group of Hospitals Trust
Correspondence to:
Correspondence to:
Professor Trimble, Department of Clinical Biochemistry, Royal Group of Hospitals Trust, Falls Road, Belfast BT12 6BE, Northern Ireland, UK;
e.trimble{at}quh.ac.uk
Background: Maternal phenylketonuria (PKU) can result in multiple congenital anomalies. In Northern Ireland, the prevalence of PKU is relatively high at 1 in 4000.
Objective: To assess the outcome of 39 pregnancies in 20 mothers.
Results: Dietary control was established before conception in 17 pregnancies (44%). Five mothers with hyperphenylalaninaemia had 11 pregnancies. There were no congenital anomalies in this group, and all appear to be developing normally. Fifteen women with classical PKU had 28 pregnancies. One pregnancy ended in a first trimester miscarriage. Twelve out of 27 (44%) completed pregnancies produced babies with a congenital anomaly and/or developmental delay.
Conclusions: Most problems occurred when dietary control was not established until after the 2nd trimester. As the cohort of young women with treated PKU is growing steadily, maternal PKU is going to become an even greater cause for concern.
Keywords: phenylketonuria; maternal; pregnancy; diet
Abbreviations: PKU, phenylketonuria; HPA, hyperphenylalaninaemia; IQ, intelligence quotient
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Arch. Dis. Child. Fetal Neonatal Ed. 2002 87: F1.
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