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The testes. In addition to producing sperm, the testes secrete the male sex hormones, primarily test
The cranium of early African H. erectus KNM-ER 3733 is nearly 1.8 million years old.
The declining age of menarche over the past 150 years has been measured in many European countries,
Preschool and child care afford opportunities for many new experiences but also can be stressful for ...
Cretinism can result in a child born to a mother who was iodine deficient during early pregnancy
Remaining health-adjusted life expectancy (years) at age 25