title: Absence of diurnal variation in semen parameters in normospermic men.
abstract: It has been previously suggested that semen parameters in men are subject to a significant diurnal variation, implying an advantage to performing IUI in the evening. Results of this prospective longitudinal study on 570 normospermic men suggest that the time of day that a sample is produced does not have an influence on semen parameters.
authors.affiliation: Montreal Fertility Centre, Montreal, Québec, Canada. mmbiljan@montrealfertility.com
authors.forename: Marinko M
authors.initials: MM
authors.lastname: Biljan
authors.forename: Diane D
authors.initials: DD
authors.lastname: Tkalec
authors.forename: Hanane
authors.initials: H
authors.lastname: Lachgar
mesh_terms: D002940:Circadian Rhythm; D003075:Coitus; D005260:Female; D005298:Fertility / Q000502:physiology*; D006801:Humans; D007314:Insemination; D008297:Male; D012661:Semen / Q000502:physiology*; D013081:Sperm Motility; D013094:Spermatozoa / Q000502:physiology*