Sentences with phrase «human sperm counts»

-- Human sperm counts down 50 % since 1950.

1993 Referring to the perceived decrease in human sperm counts, scientist Lou Guillette tells the US Congress, «Every man sitting in this room today is half the man his grandfather was, and the question is, are our children going to be half the men we are?»

Over the past four decades, human sperm counts have been markedly decreasing and the rate of testicular cancer rates has risen.

Not exact matches

Sperm counts have plunged 52.9 percent in the past 39 years in North America, Europe, Australia and New Zealand, according to a July analysis in Human Reproduction Update.

The study, which is published today (Thursday) in Human Reproduction, has found that these men, who were aged between 18 to 22, had almost half the sperm concentration and a two-fold lower total sperm count [1] and total count of motile sperm (sperm that could swim well) than did naturally conceived men of a similar age.

Elsewhere, traces of the pesticide have been linked in some human studies to reproductive problems, including reduced fertility and altered sperm counts.

The study, which is published online today (Tuesday) in Human Reproduction shows that men who ate the highest amount of fruit and vegetables with high levels of pesticide residue had a 49 % lower sperm count and a 32 % lower percentage of normally - formed sperm than men who consumed the least amount.

The latest study was a meta - analysis of English - language studies on sperm count and concentration that was published this week in the journal Human Reproduction Update.

Oxybenzone — This substance has been shown in studies to be a potent hormone disruptor, mimicking estrogen within the human body and potentially leading to diseases such as breast cancer, endometriosis, decreased sperm count, and prostate and testicular cancers.

It's funny (or maybe not so funny) how we can see a similar trend in humans, with reducing sperm counts in men, lower testosterone levels than in past generations, rising rates of infertility, and more females being born than males.

Exposure to low levels of Bisphenol A during foetal development has also been shown to lead to a variety of reproductive problems in humans, including a lowered sperm count and infertile sperm.

In fact, preliminary human research suggests that shift workers, who have notoriously abnormal sleep schedules, have lower sperm counts compared to men who do not perform shift work.

In a study published in the journal Human Reproduction, the men who ate the most pesticide - laden vegetables and fruits had 49 % lower sperm counts and 32 % more abnormally shaped sperm.

Research into the fertility of sheep exposed to endocrine disruptors in the environment by Dr. Michelle Bellingham of the University of Glasgow found that abnormalities that could result in low sperm counts were found in the testes of 42 % of the animals, which led her to suggest that the rise in the use of in - vitro fertilization in humans, particularly as a result of low sperm counts, is due to exposure to these chemicals in the environment.

In 2002 researchers at the Tokyo Metropolitan Institute of Public Health discovered that propyl paraben decreased sperm counts in young rats at and below the concentrations which the U.S. Food and Drug Administration considers safe for human consumption in food (Oishi 2002; 21CFR184.1670).