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無性行為的生殖
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通常，沒有性行為就不可能有生殖。甚至為了人工授精，至少男性必須達到性高潮和射精。他的精液然後被儲藏一個短暫的時期，直到女性卵子能夠受精之時，精液才被解凍。 可是，最近幾年裏，通過特殊的醫學手段，已經可以從未興奮的男性性器官裏提取精子了。要麼可以從附睾（顯微外科附睾精子吸取術，MESA），要麼直接從睾丸提取（雙側睾丸精子提取術，TESE）精子。迄今為止，該項技術只允許用於無其他措施可取的不孕症的罕見病例。
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Introduction |
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Reproduction without Sex
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As a rule, there can be no reproduction without sexual activity. Even for an artificial insemination, at least the man must reach orgasm and ejaculate. His semen must then be preserved for one of the recurring short periods when a woman's egg is available for fertilization by a sperm. However, in recent years it has become possible to extract sperm cells from the unexcited male sex organs by special medical procedures. The sperm is extracted either from the epididymis
(Microsurgical Epididymal Sperm Aspiration, MESA), or directly from the testicle
(Testicular Sperm Extraction, TESE). So far, this is done only in very rare cases of infertility that allow no other choice.
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