The Twins and Multiple Births Association (TAMBA), which offers support to the parents of twins and triplets, has already expressed concern about any changes.

BBC: IVF (Hank Morgan/ Science Photo Library)

Some kind of system is a must, says Sarah Newell, sponsorship manager of the Twins and Multiple Births Association, Tamba.

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But the Twins and Multiple Births Association reacted angrily to the proposals saying they flew in the face of what most patients and doctors wanted.

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Keith Reed, chief executive of the Twins and Multiple Births Association (TAMBA), said any decision to avoid a blanket ban on the use of more than one embryo represented a "victory" for patients.

BBC: IVF (Hank Morgan/ Science Photo Library)

Twins, triplets and other multiple births also increased over the decade, partly due to fertility treatments.

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