Did I miss the link to the study? I was wondering if storage contamination were a possibility? Breast milk storage bags are all plastic, and cheap brands abound.
I'm a bit confused by the article. It seems to be about this study[0]. Its the first item on Toxic Free Future's list of research. But the article states that Ryan Babadi is a lead author of the study, while there's no Babadi on the author list of the Nature publication.
It is an absolutely critical question. Were plastic/plasticized extractors or bottles used? Or was it collected at a lab directly into glass? Note that silicone isn't entirely safe either as substances like D4 (octamethylcyclotetrasiloxane) are pretty bad too.