That's only the latest research quoted and certainly rats do not equate to humans, but they are mammals. There are some Scandinavian epidemiological studies that show various links to left-handedness and other suggestions of changes to brain development, but most of these findings have not been replicated and thus are not widely reported, although a search of the Cochrane Database will allow you to find these studies.

It still suggests to me that caution and moderation is a useful approach in birth, especially in relation to a technology not proven to be safe.

Cheers

David