Peroxisome proliferator activated receptors (PPARs) are ligand-dependent transcriptional factors which are expressed in distinct tissues of the female reproductive system, including the ovary, uterus and placenta. An important role of PPARs in the regulation of reproductive processes has been previously highlighted in rodents. In the present study we investigated the in vitro effect of PPAR lig...

BACKGROUND Estradiol and progesterone as well as hippocampal GABA(A) receptors are believed to play a role in the modulation of pain. The aim of present study was to investigate the effect of intrahippocampal injections of GABA(A) receptor agonist (muscimol) and GABA(A) receptor antagonist (picrotoxin) on pain sensitivity during estrous cycle. METHODS Pain sensitivity was evaluated in rats by...

In constant dim illumination the hamster estrous cycle free-runs with a period that is a quadruple multiple of the concurrently recorded rhythm of wheel-running activity; both activity and estrous cycles are generated by biological clocks. Maintenance of stable phase angle differences between heat onset and running onset before and after treatment with deuterium oxide suggests that a common cir...

Rioux, Pierre, and Denis Rajotte. Progesterone in milk: a simple experiment illustrating the estrous cycle and enzyme immunoassay. Adv Physiol Educ 28: 64–67, 2004; 10.1152/advan.00048.2002— Experiments designed for students in reproductive physiology are rare. Here, we describe a simple experiment concerning a physiological aspect of the reproductive system. Milk samples are obtained from cows...

Japanese Dairy Cattle Productivity Analysis is carried out based on Bayesian Network Model (BNM). Through the experiment with 280 Japanese anestrus Holstein dairy cow, it is found that the estimation for finding out the presence of estrous cycle using BNM represents almost 55% accuracy while considering all samples. On the contrary, almost 73% accurate estimation could be achieved while using s...

Urine was collected from rats during 12 consecutive daily dark periods and assayed for melatonin and norepinephrine; the phase of the vaginal estrous cycle associated with each urine sample was determined from daily vaginal smears. The proestrous phase of the estrous cycle was consistently associated with significant reductions in the excretions of both compounds. The level of melatonin in any ...

To investigate uterine fluid and serum calcium (Ca) and Magnesium (Mg) variations during the estrus cycle in water buffaloes, 71 genital tracts and blood samples were collected from the abattoir in Urmia. The phase of the estrous cycle was determined by examining ovarian structures. 18 animals were pro-estrous, 15 estrous, 16 met-estrous and 22 diestrous. The uterine fluid was collected by gent...

The objective of present study is to determine the effect of green coconut water on estrous cycle in metoclopramide-induce hyperprolactinemia in female Sprague-Dawley rats. Fifty adult cyclic female Sprague-Dawley rats were used for this study. The animals were treated with green coconut water (GCW) before, after and concurrently with metoclopramide to induce hyperprolactinemia. The posttreated...

Estrous synchrony was tested using 10 pairs of sibling female rats (Rattus norvegicus). A Monte Carlo bootstrap simulation was used to construct random control groups to avoid previous statistical errors and to test for significance when there are irregular cycles. The 10 pairs of females did not exhibit estrous synchrony. The effect of cycle irregularity on the limits of synchrony was analyzed...

The aim of the study was to evaluate effect body condition score (BCS) at lambing over resumption ovarian and estrous postpartum activity in lactating Pelibuey ewes. Twenty ewes were assigned two groups, according BCS lambing: Low (LBC, n = 10) High (HBC, 10). Ovarian activities daily monitored from day 3 until first or 90 days postpartum. Continuous variables analyzed using Student´s t test bi...