Successful reproductive management in buffaloes depends on effective estrus detection. Urinary pheromones identified from natural estrous cycle have been reported to decipher estrus phase. However, its presence has not been analyzed in the urine after synchronization. Thus, our present investigation was to investigate the influence of synchronized estrus urine in bulls and to examine the presen...

Background: Tubal sterilizatio (TS) is a widely applied contraceptive method worldwide. Although most studies have described sterilization as a safe method, there are reports of TS complications. The aim of this study was to evaluate the effects of TS on ovarian function. Materials and Methods: The study comprised of 2 protocols A and B. A Protocol: survey ovarian hormone and B protocol: study ...

Introduction: RFamide-related peptide (RFRP) is believed to act as an inhibitor of gonadotropin releasing hormone (GnRH) secretion. The aim of the present study was to compare the expression pattern of RFRP neurons in the dorsomedial nucleus of hypothalamus (DMH) at different phases of the rat estrous cycle. Methods: The phases of the estrous cycle were determined in 16 adult female Sprague-...

background: adiponectin is one of the most important adipocytokines that regulate male and female fertility via adipor1 and adipor2 receptors. recently expression of adiponectin system and its negative regulatory role on hypothalamus-pituitary axis have been confirmed. objectives: no information is available about the expression pattern of adiponectin and its receptors in hypothalamus-pituitary...

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...

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 ...

Interleukin-1 (IL-1) is a pleiotropic cytokine implicated in endometrial and embryonic physiology. Our objective was to determine the presence of IL-1 in the endometrium, oviduct, and uterine fluid of cows at days 0, 7, and 14 of the estrous cycle. Immunoreactive IL-1beta was identified in endometrial and oviductal tissues throughout the estrous cycle by immunohistochemistry. Both glandular and...

Accurate analysis of female reproductive toxicity requires a thorough understanding the differences in and specifics of estrous or menstrual cycles between laboratory animals. There are some species differences such as the time of sex maturation, the length of the estrous or menstrual cycle, the length of the luteal phase, the number of dominant follicles or corpora lutea, the size of follicles...

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...