نتایج جستجو برای: estrous

تعداد نتایج: 3701  

Journal: :Journal of visualized experiments : JoVE 2015
Lisa Y Maeng Kara K Cover Aaron J Landau Mohammed R Milad Kelimer Lebron-Milad

Extinction of conditioned fear has been extensively studied in male rodents. Recently, there have been an increasing number of studies indicating that neural mechanisms for certain behavioral tasks and response behaviors are different in females and males. Using females in research studies can represent a challenge because of the variation of gonadal hormones during their estrous cycle. This pr...

2014
Masanori KOBAYASHI Miho WADA Tatsuya HORI Eiichi KAWAKAMI

Superoxide dismutase (SOD) activity in flushings from oviducts and uterine horns of 8 anestrous, 5 estrous and 7 diestrous bitches was measured. SOD activity in oviductal fluid in estrous bitches was significantly higher than that in anestrous and diestrous bitches (P<0.01). SOD activity in uterine fluid of diestrous bitches was, however, significantly higher than that in anestrous and estrous ...

Journal: :Research in veterinary science 2015
Kevin D Welch Clint A Stonecipher Dale R Gardner Kip E Panter Cory Parsons Tim Deboodt Bryan Johnson

Numerous evergreen trees and shrubs contain labdane acids, including isocupressic acid, which can cause late-term abortions in cattle. Recent research has shown that the bark from western juniper trees can also cause late-term abortions in cattle. Additionally, ranchers have observed that cattle in western juniper-infested rangelands tend to have decreased conception rates. The objective of thi...

Journal: :Experimental animals 2007
Keiko Sone Takako Yamamoto-Sawamura Sachi Kuwahara Kazutoshi Nishijima Tamio Ohno Hiroaki Aoyama Shin Tanaka

Changes of estrous cycles with aging of F344/N rats between 1 and 30 months of age (M) were monitored by vaginal smear cytology. The vaginal opening and first cornified cell phase were identified at 1.3 +/- 0.1 M and 1.5 +/- 0.2 M, respectively. Thereafter, estrous cycles showed about 5-day intervals, and ceased at 16.4 +/- 1.2 M. Thereafter irregular appearance of single cornified cell phases ...

Journal: :Hormones and behavior 2005
Simona Sava Etan J Markus

Rats can use a wide spectrum of intra- and extramaze information while navigating through the environment. The current study examined the relative contribution of an intramaze cue with regard to its proximity to the goal. Three experiments were conducted and the impact of intramaze cue removal or rotation on water maze search was examined. In males, the effect of the intramaze cue declined mono...

2002
C. WAYNE SIMPSON LEO V. DICARA

SIMPSON, C. W. AND L. V. DICARA. Estradiol inhibition of catecholamine elicited eating in the female rat. PHARMAC. BIOCHEM. BEHAV. 1(4) 413-419, 1973.-Two experiments test the hypothesis that estradiol suppresses food intake by inhibiting # dopamine hydroxylase in the anterior diencephalon where norepinephrine sensitive neurons activate feeding behavior. In the first experiment, dopamine or nor...

Journal: :Indian journal of experimental biology 2006
B N Madhuranath H N Yajurvedi

Exposure to a stressor (mild electrical shocks to foot, five times per episode, at 1800, 1830, 1900 and 1930 hrs of proestrus) coinciding with period of pre-ovulatory progesterone secretion in rats abolished estrous behavior as shown by the absence of lordosis response and a significant increase in rejection quotient compared to controls. These rats did not show spermatozoa in the vaginal smear...

Forootan S Kafi M Tamadon A,

Background: Adiponectin is an adipocytokines which is secreted from the adipose tissue of human and domestic animals. No information is available regarding the follicular fluid adiponectin concentrations in dairy cows. Therefore, the aim of the present study was to determine the follicular fluid adiponectin concentrations in different-sized follicles in the luteal phase of the estrous cycle in ...

Journal: :American journal of physiology. Regulatory, integrative and comparative physiology 2006
Kenneth P Winnard Natalia Dmitrieva Karen J Berkley

Central nervous system neurons process information converging from the uterus, colon, and bladder, partly via the hypogastric nerve. This processing is influenced by the estrous cycle, suggesting the existence of an estrous-modifiable central nervous system substrate by which input from one pelvic organ can influence functioning of other pelvic organs. Here, we tested predictions from this hypo...

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