A Graphical Method for Estimating Length of Gestation and Estrous Cycle Length from Birth Intervals in Rodents

1985 ◽  
Vol 66 (1) ◽  
pp. 168-173 ◽  
Author(s):  
B. J. Fox
Keyword(s):  
Estrous Cycle ◽  
Cycle Length ◽  
Graphical Method ◽  
Birth Intervals ◽  
Length Of Gestation

Effect of Photoperiod on Estrous Cycle Length in the Rat

Endocrinology ◽  
1968 ◽  
Vol 83 (6) ◽  
pp. 1355-1357 ◽  
Author(s):  
JOAN C. HOFFMANN
Keyword(s):  
Estrous Cycle ◽  
Cycle Length

scholarly journals Characterization of biological types of cattle (Cycle VII): Influence of postpartum interval and estrous cycle length on fertility12

2007 ◽  
Vol 85 (9) ◽  
pp. 2156-2162 ◽  
Author(s):  
R. A. Cushman ◽  
M. F. Allan ◽  
R. M. Thallman ◽  
L. V. Cundiff
Keyword(s):  
Estrous Cycle ◽  
Cycle Length

Effect of the rate of progesterone decline at luteolysis on the ovulatory follicles and subsequent estrous cycle length in ewes

1997 ◽  
Vol 46 (1-2) ◽  
pp. 79-87 ◽  
Author(s):  
T.M. Wiley ◽  
H. Cárdenas ◽  
W.F. Pope
Keyword(s):  
Estrous Cycle ◽  
Cycle Length ◽  
Ovulatory Follicles

Effect of hCG administration on day 7 of the estrous cycle on follicular dynamics and cycle length in cows

1996 ◽  
Vol 45 (3) ◽  
pp. 583-592 ◽  
Author(s):  
P.C. Sianangama ◽  
R. Rajamahendran
Keyword(s):  
Estrous Cycle ◽  
Cycle Length ◽  
Follicular Dynamics

The effect of cooling management on blood flow to the dominant follicle and estrous cycle length at heat stress

2016 ◽  
Vol 86 (2) ◽  
pp. 626-634 ◽  
Author(s):  
Hen Honig ◽  
Lior Ofer ◽  
Moshe Kaim ◽  
Shamay Jacobi ◽  
Dima Shinder ◽  
...  
Keyword(s):  
Blood Flow ◽  
Heat Stress ◽  
Estrous Cycle ◽  
Cycle Length ◽  
Dominant Follicle

Effect of dexamethasone and confinement stress on estrous cycle length in beef heifers

1979 ◽  
Vol 11 (1) ◽  
pp. 106 ◽  
Author(s):  
S.H. Pool ◽  
R.A. Godke ◽  
R.H. Ingraham
Keyword(s):  
Estrous Cycle ◽  
Cycle Length ◽  
Beef Heifers ◽  
Confinement Stress

scholarly journals Disruption of Ovarian Utilisation of Proteins by Tetrapleuratetraptera Fruit Extract Impairs Estrous Cycle and Ovarian Functions in Female Rats

2021 ◽  
pp. 1-8
Author(s):  
Ologhaguo Macstephen Adienbo ◽  
Ogechi Stephanie Ezeala
Keyword(s):  
Superoxide Dismutase ◽  
Body Weight ◽  
Estrous Cycle ◽  
Cycle Length ◽  
Female Rats ◽  
Total Protein Content ◽  
Vaginal Smear ◽  
Fruit Extract ◽  
Sod Activity ◽  
Microscopic Evaluation

Aim: Reports that some phytochemicals interfere with reproductive functions, in both humans and animals necessitated this study which is aimed at determining the effects of fruit extract of Tetrapleuratetrapteraon oestrous cycle and ovarian functions in females. Methods: Adult female wistar rats weighing 160-180 g with regular 4-5 days oestrus cycle were selected into 4 groups of 6 animals each. Group 1 (control) administered 1ml distilled water; groups II, III and IV were daily treated with the extract at doses 75 mg/kg, 150mg/kg and 300 mg/kg body weight respectively, orally for 21 days. Microscopic evaluation of vaginal smear was done daily to determine the various stages of the estrous cycle, their duration, as well as the estrous cycle length. After 24 hours of last administration, each rat was weighed, sacrificed, and right ovary was homogenised and the homogenate used for analyses of total protein content, superoxide dismutase (SOD) activity, and malondialdehyde (MDA) concentration, according to standard protocols. Results: There was significant (P < 0.05) increase in duration of diestrus phase and estrous cycle length in all the extract-treated groups, compared to control animals. Also, there was relative reductions in the duration for proestrus (p<0.05), estrus (p<0.05) and metestrus (p<0) phases of the cycle, with a relative increase in duration for diestrus phase (p<0.05) in animals treated with 150 mg/kg and 300 mg/kg body weight respectively. In addition, a significant (P < 0.05) increase was observed in ovarian Protein, and Superoxide dismutase (SOD) enzyme activity; as well as significant (P < 0.05) reduction in malondialdehyde (MDA) level and in weight gain in the test animals, compared to the control. Conclusion:Tetrapleuratetrapterafruit extract disrupts ovarian utilisation of proteins in the ovaries, thereby impairing oestrous cyclicity, and body weight. These could result to infertility.

scholarly journals Development of per vaginal route of serial observations of ovarian activities in buffalo using a simple fiberscope

2021 ◽  
Vol 29 (1) ◽  
pp. 132-137
Author(s):  
O. F. Smith ◽  
L. C. Cruz
Keyword(s):  
Estrous Cycle ◽  
Follicular Fluid ◽  
Cycle Length ◽  
Pelvic Cavity ◽  
Corpora Lutea ◽  
Vaginal Route ◽  
Experimental Animals

Sir normally cycling Philippine carabaos were selected from a herd after showing normal estrous cycle for two consecutive times. Observations of the ovarian structures wee performed with the use of a simple fiberscope (model FS 100). The fiberscope was guided to the pelvic cavity close to the position of the ovary by inserting it through a cannula. To facilitate observation of ovarian structures another individual palpated the ovary gently as it was brought close to the fibers tip. The use of a simple fiberscope showed that it was feasible and practical to trace the development and regression of individual follicles with this device. Follicular fluid was transparent and clear in appearance. Corpora lutea on the ovary was less spherical in appearance and was surrounded by a boarder of luteinized tissue. Only well defined forms with a relatively smooth online were considered follicles. Follicles as small as 2 to 3mm were clearly viewed. The use of anesthesia to temporarily paralyze the sacro-coccygeal area did not change the estrous cycle length of the experimental animals. The animals still maintained their normal estrous cycle length (averaging 21.5 +1.5 days and showed signs of estrus, which included mucus discharge, mounting other animals and being mounted and bellowing. 

The Effects of In Vivo Derived Trophoblastic Vesicles on Corpus Luteum Regression, Estrous Cycle Length, and Serum Progesterone Concentrations in Dairy Cattle.

2009 ◽  
Vol 81 (Suppl_1) ◽  
pp. 246-246
Author(s):  
Jillian L. Fain ◽  
Emily R. Waggoner ◽  
John R. Gibbons
Keyword(s):  
Dairy Cattle ◽  
Corpus Luteum ◽  
Estrous Cycle ◽  
Cycle Length ◽  
Serum Progesterone
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