Or does that question answer itself?
From Douglas Yates:
“In modern times, an increase in chemical production has led to widespread environmental chemical contamination that can affect normal hormone function in those exposed, particularly in vulnerable populations, such as children and pregnant women. Many of these identified endocrine-disrupting chemicals (EDCs), which include pesticides and substances used in manufacturing a multitude of products, have been reported to interfere with thyroid hormone function, yet public health policy does not fully address the risks to vulnerable populations.”
Brain disorders in children linked to common environmental toxin exposures https://www.sciencedaily.com/releases/2018/03/180324103152.htm
Psychosexual outcome of gender-dysphoric children https://www.ncbi.nlm.nih.gov/pubmed/18981931
Rapid-onset gender dysphoria – a study of parental reportshttps://www.ncbi.nlm.nih.gov/pubmed/30114286