The decrease in male fertility

A recent analysis showed that in France, the concentration of sperm in men decreased by almost one third between 1989 and 2005. Most, but not all, studies by various European countries with large databases and the possibility

Sunday's Health Tip: The Decline in Male Fertility – Scientists Puzzle Over Declining Sperm Counts; a 'Crisis' or Not Enough Data?

Decrease in male mouse fertility by hydrogen sulfide and/or ammonia can Be inheritable - ScienceDirect

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Sperm quality decreases nearly 60% from your 30s to your 50s - Give Legacy

Male Age and Fertility

Sperm Counts Are Down, But It Doesn't Mean There's A Male Fertility Crisis

Nell Frizzell on “The Panic Years” - Council on Contemporary Families

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The Decline in Male Fertility - WSJ

Fears over falling human sperm count may be overblown — Harvard Gazette

The Effect Smoking Has on Sperm and Male Fertility

Should Symbionts Be Nice or Selfish? Antiviral Effects of Wolbachia Are Costly but Reproductive Parasitism Is Not

Sperm counts are falling precipitously across the rich world

Oligospermia: Low Sperm Count Causes, Symptoms & Treatment