One woman, who produced too much milk for her newborn, wrote about how she heard there were premature triplets on the ward when she was in recovery after giving birth.

一位妇女，对她的新生儿来说她分泌的母乳太多了，她写道，当她在产后康复时听说产房里有人产了三胞胎。

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The study excluded twins and triplets as they are known to be at increased risk of premature birth and low birth weight.

BBC: IVF 'not reason for birth risks'