Donald Trump is reportedly expected to claim there is a link between the use of paracetamol in pregnancy and the development of autism - but what does the evidence say?

Americans consume more than 40% of all the world's paracetamol, spending in excess of $4bn a year on products containing acetaminophen (as it is known in America - or by its leading brand name, Tylenol).

Autism rates in the US are also on the rise - going up from about one in 150 children in the year 2000, to around one in 30 today.

There have also been a number of well-publicised studies suggesting a correlation between mothers who took paracetamol during pregnancy and the birth of a child with autism or other neurodevelopmental disorders such as ADHD.

So surely something must be going on?

Well, not necessarily.

In

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