Semen analysis in fertile patients undergoing vasectomy: reference values and variations according to age, length of sexual abstinence, seasonality, smoking habits and caffeine intake

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Bernardo Passos Sobreiro; Antonio Marmo Lucon; Fábio Firmbach Pasqualotto; Jorge Hallak; Kelly Silveira Athayde; Sami Arap;
(2005)

CONTEXT AND OBJECTIVE: Recent studies have shown regional and population differences in semen characteristics. The objective was to establish reference values for semen analysis and to verify the effect that age, length of sexual abstinence, seasonality, smoking habits ... View more