Factores asociados a la variabilidad de la calidad seminal: un estudio de seguimiento

Abstract

ObjectiveThe aim of this study is to analyze whether abstinence time or the frequency of ejaculation and selected lifestyles could be related to variability of semen quality. Material and methodsThis is a prospective, follow-up study over 1year evaluating several semen samples from 19 healthy male volunteers. Semen samples were obtained approximately every 4-6weeks. Besides, follow-up epidemiological questionnaires on lifestyles were filled out by the participants. Intra- (%CVi) and inter-individual (%CVe) coefficients of variation were calculated. ResultsThe highest CVi was 74.5% for sperm count and 65.6% for sperm concentration, followed by 41.2% form sperm morphology and 30.1% for volume. The lowest CVi was 14.6% for sperm motility. The CVe were higher and presented a similar pattern. With regard to lifestyles, comparable results were obtained. Generally, CVi and CVe were lower in subjects practicing regular, light or moderate exercise, and having irregular intake of wine, beer or coffee. ConclusionsThe recommendation of analyzing only one semen sample could lead to a mistaken diagnosis of the men's fertility potential. However, the results of a single semen analysis could be more reliable or consistent if some lifestyles are present.