The HFEA could try the first option, and resort to the second only if clinics fail to reduce the twin rate, Braude says.

HFEA可能会采取第一个方案，但如果诊所无法降低双胞胎率的话，就只有求助于第二套方案了，Braude说道。

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"The international data shows that the incidence of twins after IVF can be reduced without damaging women's chance of conceiving," says Braude.

“国际数据显示，IVF后双胞胎的出生率可以在不影响妇女受孕率的情况下降低，”Braude说道。

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The development has been welcomed by Professor Peter Braude, an IVF specialist at Guys and St Thomas's hospital.

BBC: Genetic advance raises IVF hopes