The stevia studies I referred to were not "cooked up" or in any way endorsed or connected with sweetener manufacturers. At least one was done before stevia was even legalized as a sweetener in the USA.
There are many natural food products used for hundreds of years in apparent safety that were found to have adverse health effects no one ever tied to the herb. Who would think to tie stevia use by a pregnant woman to her sons having smaller than normal genitalia?
Especially since stevia's traditional users were men on hunting trips if I'm recalling correctly.
I dug deeper into the artificial sweetener research than anyone I've met yet. I've read dozens of the studies and hundreds of the abstracts. I've read critiques and critiques of critiques of the research on all sides.
To get at anything resembling the truth on this issue, you have to really dig deep.