during the islamic lunar month of ramadan millions of muslims abstain from drinking and eating from dawn to sunset. the objective of this study was to investigate the effect of intermittent islamic fasting on reproductive function, hypothalamic-pituitary-thyroid axis and the peripheral metabolism of thyroid hormones in men. we measured serum levels of fsh, lh, testosterone, prolactin, tsh, t4, ...

There is a complex, bidirectional interdependence between sex steroid hormones and epilepsy; hormones affect seizures, while seizures affect hormones thereby disturbing reproductive endocrine function. Both female and male sex steroid hormones influence brain excitability. For the female sex steroid hormones, progesterone and its metabolites are anticonvulsant, while estrogens are mainly procon...

Seasonal cycles of reproduction are common in many mammals and these are combined with the necessary energy budgeting for thermoregulatory challenges. Many mammals meet the challenge of changing environmental temperatures in winter by using torpor, a controlled reduction in body temperature and metabolic rate. We aimed to determine the effects of photoperiod and reproductive hormones on the sea...

The success of conception in buffalo is greatly dependent on precise estrus detection and time of artificial insemination (AI). Various visual, behavioral, biochemical and gyneco-clinical parameters have been tracked closely and a cost-effective combinatorial model has been developed to detect estrus in buffaloes. Pheromones play pivotal roles in reproduction and behavior of mammals. Urine, an ...

The effects of ovarian hormones and reproductive experience on multiple memory system bias in female rats and women

The physiological mechanisms that control energy balance are reciprocally linked to those that control reproduction, and together, these mechanisms optimize reproductive success under fluctuating metabolic conditions. Thus, it is difficult to understand the physiology of energy balance without understanding its link to reproductive success. The metabolic sensory stimuli, hormonal mediators and ...

background: the increase in the rate of infertility in women has prompted the need to search for plants with antifertility potentials. objective: the effect of administration of aqueous extract of cnidoscolous aconitifolius leaves for seven days on reproductive hormones of female wistar rats was investigated. materials and methods: sixty female albino rats were grouped into four (a, b, c and d)...

Background and Aims: Quantum dots (QDs), as colloidal nanocrystalline semiconductors, present QD wavelengths in terms of biomedical assays and imaging, though the high toxicity of their core demands to be taken into consideration. Investigating this subject is taken into account as an important concept   concerning use of these nanoparticles in the medical applications. Materials a...

Alcohol use affects all three parts of the hypothalamic-pituitary-gonadal (HPG) axis, a system of endocrine glands and hormones involved in male reproduction. Alcohol use is associated with low testosterone and altered levels of additional reproductive hormones. Researchers are investigating several potential mechanisms for alcohol's damage. These mechanisms are related to alcohol metabolism, a...

Plants have physical and chemical mechanisms for defense from attack by animals. Phytochemical defenses that protect plants from attack by insects include antifeedants, insecticides, and insect growth regulators. Phytochemical options exist by which plants can modulate the fertility of the other major group of plant predators, vertebrate herbivores, and thereby reduce cumulative attacks by thos...