The effect of alcoholic extract of the aerial parts of Artemisia vulgaris Linn on estrous cycle and implantation, in female albino rats, was studied. The drug induced an irregular estrous cycle with random disappearance of estrous phase and increase in the number of metestrus phases within the estrous cycle, observed for the total test period of 18 days. It exhibited 80% anti-implantation activ...

to investigate uterine fluid and serum copper (cu) and zinc (zn) variations during the estrous cycle in water buffaloes, 71 genital tracts and blood samples were collected from the abattoir in urmia, iran. the phase of the estrous cycle was determined by examining ovarian structures; 18, 15, 16 and 22 were pro-estrous, estrous, met-estrous and diestrous, respectively. the uterine fluid was coll...

Development of protocols to manipulate the estrous cycle so all females are in estrus during a short, predefined period (synchronized estrus) while maintaining normal fertility has been a difficult goal to achieve; however, over the past two decades efficacious synchronization protocols have been created and are available to producers today. These protocols have been anticipated for a long time...

Introduction The development of effective methods of synchronizing estrus and ovulation has been based on our understanding of the physiological and hormonal mechanisms controlling the estrous cycle and the initiation of estrous cyclicity and prepuberty in heifers and postpartum cows. Although estrus synchronization products (PGF2, MGA, CIDR and GnRH) and protocols have changed over time, the ...

Sex hormonal milieus during the female fertility cycle modulate the tumor vascular permeability of breast cancer. It has been proposed that the liposomal formulated doxorubicin (ie, Doxil), given at the menstrual/estrous stage with the predicted highest tumor vascular permeability, allows significantly increased drug retention in the breast tumor. In the current study, syngeneic murine 4T1 mamm...

Introduction: In female rats sensitivity to antinociceptive treatment varies during estrous cycle stages. The role of GABA through GABAB receptor in nociception has been established. The aim of the present study is to investigate the effect of intercerebroventicular injection of GABAB receptor agonist (baclofen) and GABAB antagonist (CGP35348) on pain sensitivity during different stages of estr...

The response of dairy bulls to the urine of cows in various stages of the reproductive cycle was quantified by presenting 200 ml of urine in a stainless steel bowl to the stanchioned bulls for 10 min. Estrous mucus was also presented in the same manner. Sniffs, nose licks and flehmen responses were recorded. Of 15 bulls tested only 7, or 47%, met the criteria of two flehmens in response to estr...

The controls of food intake differ in male and female rats. Daily food intake is typically greater in male rats, relative to female rats, and a decrease in food intake, coincident with the estrous stage of the ovarian reproductive cycle, is well documented in female rats. This estrous-related decrease in food intake has been attributed to a transient increase in the female rat's sensitivity to ...

Five experiments were conducted to test the hypothesis that psychosocial stress interferes with the estrous cycle of sheep. In experiment 1, ewes were repeatedly isolated during the follicular phase. Timing, amplitude, and duration of the preovulatory luteinizing hormone (LH) surge were not affected. In experiment 2, follicular-phase ewes were subjected twice to a "layered stress" paradigm cons...

Method Twenty female Sprague Dawley rat (SD rat) were randomly divided into two groups according to their bedding types. The 1 group was raised in wood shaving bedding as a control and 2 one was in corncob bedding as an endocrine disrupting agent. Each group was checked daily for the first day of vaginal opening, and their vaginal smears were collected to determine estrous cyclicity after vagin...