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Risk of birth defects higher for twins and triplets

Researchers have found the risk of birth defects, for twins and triplets is higher than single births, almost doubling in the last 30 years.

Scientists say the trend could be due to the growth of IVF treatment, which can lead to multiple births.

On average, the risk of birth defects was 27% higher for multiple than for singleton births Credit: ITV News

Co-leader of the study, Professor Helen Dolk, from the University of Ulster, said: "It is clear that more research needs to be done to determine the contribution of Assisted Reproductive Technology to the risk of congenital anomalies in multiple births."