Andrology deals with male infertility, erectile dysfunction, loss of libido, ejaculatory disorders, hypogonadism, delayed puberty, male contraception, gynecomastia and aspects of the aging male. New trends in reproductive medicine have influenced the evaluation of andrological patients in recent years. Even loss of ejaculated spermatozoa does not necessarily exclude paternity since testicular sperm extraction has been established in men with obstructive or non-obstructive azoospermia. The most important new aspect in andrology is the publication of the World Health Organization laboratory manual for semen analysis in 2010. Dramatic changes concerning sperm motility and morphology must now be considered for the interpretation of standard semen parameters.
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