PLAYING FOOTSIE WITH MONSANTO
In fact Monsanto uses the identical laboratory established by Big Tobacco to this day --used by Michelle McGuire to "validate" this study.
If you scroll all the way to the bottom you'll find out about Covance previously called Hazelton--started by Big Tobacco.
Emily Willingham refuted the "independence" of study concisely with her headline in Forbes: Monsanto Linked Study Finds No Monsanto Linked Herbicide Glyphosate In Breast Milk
Let's, please, suspend our well-founded disbelief & give authors benefit of doubt nevertheless- let's check the veracity of author's remaining claims to see if the study's conclusions are as "scientifically sound" as the author and others like Kevin Folta ( one of the anointed science experts and communicators) claims
"McGuire and her colleagues: “our study provides strong evidence that glyphosate is not in human milk.”
This independent study used an appropriate, precise, and validated analytical method and arrived at a scientifically sound conclusion....." Civil Eats
But first, Monsanto's glyphosate laundering campaign in context.
Can you spot the spotlight fallacy?
The Accredited Independent Organization is none other than Covance Labs- a contract research  organization (CRO) hired by tobacco companies, agrochemical, biotechnology, processed food industry to conduct animal toxicity testing for agrochemicals, petrochemicals, household products, and toxins.
Covance was associated with the Council for Tobacco Research and conducted animal testing for tobacco companies. Covance has a sordid history of chronic egregious animal abuse that includes "Striking, choking, screaming and cursing at "uncooperative," frightened and sick monkeys.Slamming the head of an escaped monkey against concrete. Injuries left untreated until they became necrotic. The Broken arm was untreated for 4 day.
Apart from the unbelievable cruelty and unforgivable inhumanity, this "outside accredited organization" was cited for lack of employee training and supervision, uncertified employees anesthetizing animals, knowingly using unhealthy animals in studies, malaria-infected monkeys still used in studies for pharmaceutical and lying about the cause of death for three monkeys found dead in their cages, and intoxicated employees performing lab procedures on monkeys.
This is one reason any arguments Monsanto's surrogates raise about animal welfare ethics ( as were raised against Seralini's famous staudy) as well as Alison Van E in arguing against animal feeding studies based on ethical concerns, can be immediately dismissed.
This profit- laboratory's income is dependent on producing outcomes paid for- otherwise its contracts and repeat business dry up. In fact, it admits to this being the case : " ... a company with a customer base primarily made up of manufacturers rather than healthcare providers can help LabCorp mitigate reimbursement trends..." and “As a combined company, we will be well-positioned to respond to and benefit from the fundamental forces of change in our business, including payment for outcomes" 
It would be accurate to say that the only thing a study this flawed proves is that Michelle McGuire et al failed to detect glyphosate in breast milk of 41 women from Pullman and Moscow- not a great Monsanto soundbite.
@kevinfolta @Nutr_Prof Urine glyphosate levels on 2000 paired babies wld also be very helpful...to cross check accuracy of ur milk findings— Dr. Ena Valikov (@beachvetlbc) April 10, 2016
@kevinfolta @Nutr_Prof Sample of 41 insignificant. Pls report urine & milk glyphosate levels, on randomly assigned sample of 2000 farm women— Dr. Ena Valikov (@beachvetlbc) April 10, 2016
@kevinfolta @beachvetlbc Of course I agree with Kevin! Your comments are childish and uninformed. I do not respond because you just harass.— Shelley McGuire (@Nutr_Prof) April 10, 2016
 Michelle. If I am so childish why does the discussion section of your paper listing limitations of your study echo my criticism?
 Civil Eats. Is there glyphosate in breast milk?
 LabCorp's Covance Deal
 Greens Warn Breast Milk Unsafe
 Covance Labs- Tobacco Portal
 Who buys organics?