Quick — name a brand of weedkiller.

What popped into your head? Was it, by any chance, Roundup?

The most popular and most widely-used herbicide in the world?

If it was, that’s great; the ubiquitous weedkiller will be our topic for discussion today

. Why? Because a new, comprehensive review of existing data again reveals, once again,

that scientific evidence shows that it may cause birth defects.