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Published 18:43 9 Feb 2015 GMT
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Speaking to The South China Morning Post, a Dr Yu Kai-man, said: "It was almost impossible to detect during the prenatal check-up as the embryo inside the baby was too small."
"Since it is impossible for the little girl to have conceived the pregnancy on her own, the fertilisation of the twin foetuses, of course, belongs to her parents, which has gone to the wrong place."Health
