Perfect Parenting is a collection of mummy opinion blogs, and as such they form exactly that – the opinions of the original authors. They should not be taken as advice, as all opinions by their very nature can be agreed with or disagreed with.
By continuing to use Perfect Parenting, you accept the terms laid out in the above paragraph. Home truths can hurt sometimes, but in the event that you cannot handle these particular home truths we would suggest that you read blogs elsewhere.
Also, any studies that are referred to are likely to be absolute bollocks.