title: Rhythms in the ovulatory cycle. 2nd: LH, FSH, estradiol and progesterone.
abstract: The circadian profiles of LH, FSH, estradiol and progesterone were compared in a homogeneous group of 15 young normally cycling women, at 4 well characterized times of the menstrual cycle: early follicular (EF), late follicular (LF), early luteal (EL) and late luteal (LL) stages. The circatrigintan profiles of the same hormones were also evaluated. Population-mean cosinor analysis failed to demonstrate a circadian periodicity of LH in any of the 4 stages of the menstrual cycle; a circadian rhythm for FSH was present only in the 2 luteal phases (EL, LL); the same type of rhythmicity was present for estradiol only in the late luteal stage; on the contrary, a highly significant circadian rhythm of progesterone was present in each of the 4 menstrual stages considered (EF, LF, EL and LL). Population-mean cosinor analysis showed a highly significant circatrigintan periodicity of LH and FSH with the acrophases respectively between -109 degrees and -181 degrees and between -74 degrees and -125 degrees. Circatrigintan rhythmicity was also present for estradiol (acrophases between -161 degrees and -245 degrees) and progesterone (acrophases between -246 degrees and -296 degrees).
authors.affiliation: Cattedra di Cronobiologia, Facoltà di Medicina e Chirurgia, Università degli Studi di Milano, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Carandente
authors.forename: A
authors.initials: A
authors.lastname: Angeli
authors.forename: G B
authors.initials: GB
authors.lastname: Candiani
authors.forename: P G
authors.initials: PG
authors.lastname: Crosignani
authors.forename: F
authors.initials: F
authors.lastname: Dammacco
authors.forename: L
authors.initials: L
authors.lastname: De Cecco
authors.forename: P
authors.initials: P
authors.lastname: Marrama
authors.forename: M
authors.initials: M
authors.lastname: Massobrio
authors.forename: L
authors.initials: L
authors.lastname: Martini
mesh_terms: D000328:Adult; D002940:Circadian Rhythm; D004958:Estradiol / Q000097:blood*; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood*; D005498:Follicular Phase / Q000502:physiology; D006801:Humans; D008183:Luteal Phase / Q000502:physiology; D007986:Luteinizing Hormone / Q000097:blood*; D008597:Menstrual Cycle / Q000502:physiology*; D011374:Progesterone / Q000097:blood*
chemical_list: D011374:Progesterone; D004958:Estradiol; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone