Whether puberty is brought forward or delayed by the influence of PFAS …

Whether puberty is brought forward or delayed by the influence of PFAS, there are contradictory study results on this.
According to a US study from August 2016 published in the journal Environmental Science & Technology Letters, PFAS causes premature puberty.

The Journal for Clinical Endocrinology and Metabolism published the result of a series study in April 2019, which states that puberty would be delayed by the influence of PFAS.

The German Federation for the Environment and Nature Conservation, on the other hand, speaks of "reproductive damage" as well as disturbances of the hormone system in connection with PFAS.

Detection of Poly- and Perfluoroalkyl Substances (PFASs) in U.S. Drinking Water Linked to Industrial Sites, Military Fire Training…Drinking water contamination with poly- and perfluoroalkyl substances (PFASs) poses risks to the developmental, immune, metabolic, and endocrine health of consumers. We present a spatial analysis of 2013–2015 national drinking water PFAS co