无性行为的生殖

通常，没有性行为就不可能有生殖。甚至为了人工授精，至少男性必须达到性高潮和射精。他的精液然后被储藏一个短暂的时期，直到女性卵子能够受精之时，精液才被解冻。

可是，最近几年里，通过特殊的医学手段，已经可以从未兴奋的男性性器官里提取精子了。要么可以从附睾（显微外科附睾精子吸取术，MESA），要么直接从睾丸提取（双侧睾丸精子提取术，TESE）精子。迄今为止，该项技术只允许用于无其他措施可取的不孕症的罕见病例。

Introduction

Reproduction without Sex

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.