Sperm Count (a Surrogate For Male Health) In The West Has Declined By 60% Since The 1970s
There have been a few recent studies showing that sperm quality of western males has fallen 20% - 30%. Not so alarming. Now a larger study shows that the decline in male fertility is much worse than previously thought. Since early 1970s sperm count has fallen as much as 60% when data gathering of this began. Thyroid and Test levels are primary determinants of sperm count/quality. We have confirmed epidemics of hypothyroidism and hypogonadism. Oceans are full of plastics and endocrine disrupters which fuck with thyroid gland. Amercants (tehe pero) have flourine in their water which fucks with thryroid too. Modern 30 year old has been compared to that of a 65 to 70 year old male of the 1970s. This is with regards to horomones and firtility. This matches well with fun studies on male grip stength showing that men in 20s and 30s have the grip strength of 60 year olds from back in the day.
Temporal trends in sperm count: a systematic review and meta-regression analysis | Human Reproduction Update | Oxford Academic
academic.oup.com
Sperm counts in the Western world have declined nearly 60 percent since the 1970s
"…In a comprehensive study published in Human Reproduction Update, researchers analyzed data from studies spanning 1973 to 2011. Over this time period, they found a drastic drop in both sperm concentration and sperm count among men in North America, Europe, Australia, and New Zealand. No decline this significant was documented in other parts of the world, where less data is available. The study also shows that the rate of decline in the West has not slowed in recent years. The authors say their findings should spur “massive” efforts to identify and address the cause of this decline, which is still unknown. We spoke with lead researcher Hagai Levine, an epidemiologist and public health physician at the Hebrew University-Hadassah, about these findings."
"…Levine: First, these data demonstrate that the proportion of men with sperm counts below the threshold for subfertility or infertility is increasing. Clear effects on population growth will only be seen when a significant proportion of the population has very low fertility. Moreover, given the findings from recent studies that reduced sperm count is related to increased morbidity and mortality, the ongoing decline points to serious risks to male fertility and health."
Don't starve yourselves bros. Also test replacement therapy has become pretty big business. The irony is exogenous testosterone shuts down HPTA axis, which includes FSH and LH critical for forming sperm. The strongest correlation that I can tell is with the rise in plastics, SSRI usage and death oil.
"11% of American[t]s over the age of 12 take an antidepressant." dated too!!!
cdc.gov