| Seasonal fluctuation in diurnal rhythms of luteinizing hormone secretion in ewes during the mid-luteal phase of the oestrous cycle. | |
| | |
MedLine Citation:
|
PMID: 8464028 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
Diurnal and seasonal fluctuations were detected in luteinizing hormone (LH) interpulse interval, but not amplitude, in ewes examined during the mid-luteal phase of an oestrous cycle at five stages of the breeding season. Daytime and night-time LH interpulse intervals were greater in the early and late than in the mid-breeding season (P < 0.05). During the early and late breeding season, LH interpulse interval was less during daylight than during darkness (P < 0.05). Toward the mid-breeding season, interpulse interval decreased during daytime earlier in the season than the night-time decrease. It was concluded that the diurnal fluctuations observed are a component of a circannual rhythm in LH secretion resulting from gradual seasonal transitions in photoperiodic drive to, or an endogenous rhythm in, the hypothalamic-pituitary axis in ewes. |
| | |
Authors:
|
W D Currie; R J Medhamurthy; S J Cook; N C Rawlings |
Related Documents
:
|
10768018 - An appraisal of the disc-macula distance to disc diameter ratio in the assessment of op... 14989528 - Relative influences on recent changes in the first birth ratio in the united states. 23261788 - Effect of situation on mother-infant interaction. 9839738 - Seasonal patterns of deaths in matlab, bangladesh. 2592178 - The 1984 national perinatal census: design, organization and uses for assessing obstetr... 4006568 - Simulating conditions of learned helplessness: the effects of interventions and attribu... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: Journal of reproduction and fertility Volume: 97 ISSN: 0022-4251 ISO Abbreviation: J. Reprod. Fertil. Publication Date: 1993 Jan |
Date Detail:
|
Created Date: 1993-05-03 Completed Date: 1993-05-03 Revised Date: 2006-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 0376367 Medline TA: J Reprod Fertil Country: ENGLAND |
Other Details:
|
Languages: eng Pagination: 71-4 Citation Subset: IM |
Affiliation:
|
Veterinary Physiological Sciences, University of Saskatchewan, Saskatoon, Canada. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Circadian Rhythm* Female Luteal Phase / physiology* Luteinizing Hormone / blood, secretion* Seasons* Secretory Rate / physiology Sheep / physiology* |
| Chemical | |
Reg. No./Substance:
|
9002-67-9/Luteinizing Hormone |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Effects of dilution procedure and culture conditions after thawing on survival of frozen bovine blas...
Next Document: Calmodulin-binding proteins in bovine semen.