A Danish study showed that, between 1940 and 1990, average sperm counts dropped from 113 million to 66 million sperm per milliliter of semen. Further studies showed that by 2014, counts had declined to between 40 and 50 million per milliliter. Which factor do scientists consider the most likely cause of these rapidly declining sperm counts?
A) More frequent ejaculations
B) Conception by in vitro fertilization
C) Tight-fitting pants that increase scrotal temperatures
D) Mothers' lifestyles, including smoking, drinking, and obesity
E) Environmental pollutants, such as pesticides, that disrupt sex hormones
Correct Answer:
Verified
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