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What happens to unused sperm/semen in the testes? If it's reabsorbed into the body, how, and does this have a particular effect on health? - Quora
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How is the body of a sperm suited for fertilization of an egg? | Socratic
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Sperm biology and maturation (Chapter 10) - Textbook of Clinical Embryology
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The science of sperm | OpenLearn - Open University
Germ Cells and Fertilization III – The sperm – Ritu's Biology Hub
Body Talk: the genitourinary systems - Understanding the male reproductive system
Male Reproductive System (for Parents) | Nemours KidsHealth
Scientists a step closer to mimicking way human body creates sperm | Reproduction | The Guardian