Endocrine disrupting xenoestrogens in fish may be interfering with male fertility.
Until the twentieth century, the average age of puberty for girls was 16 or 17 years old.
Here are some recent videos on xenoestrogens:
Estrogen in Meat, Dairy and Eggs
Alkylphenol Endocrine Disruptors and Allergies
Dairy Estrogen and Male Fertility
Dietary Sources of Alkylphenol Endocrine Disruptors
Male Fertility and Diet
Please feel free to post any ask-the-doctor type questions here in the comments section and I’d be happy to try to answer them. And check out the companion video, "Xenoestrogens & Early Puberty." Also, there are 1,449 other subjects covered in the rest of my videos--please feel free to explore them as well!
For more context, check out my associated blog posts: Mercury Testing Recommended Before Pregnancy, Pollutants in Californian Breast Tissue, Why Are Children Starting Puberty Earlier?, and Male Fertility and Dietary Pollutants.