Polygynous lek-mating systems are characterized by high reproductive skew, with a small number of males gaining a disproportionate share of copulations. In lekking species, where female choice drives male mating success and patterns of reproductive skew, female preferences for 'good genes' should lead to preferred males having high reproductive success in all years. Here we investigate whether ...

background: the prevalence of polycystic ovarian syndrome (pcos) particularly is increased in adolescents. very few longitudinal follow-up for assessment of ovarian reserve in women of late reproductive age with previously confirmed pcos have been conducted, especially after its diagnosis and treatment in adolescence. objective: the aim of the present study was to compare of the ovarian reserve...

background: higher risks of reproductive problems have been found in underweight and overweight women with rapid weight gain or loss but evidence is inconsistent especially in relation to the effect of age of body weight changes. objective: the aim of our study was to detect the peculiarities of menstrual function, prevalence of different types of reproductive disorders and correlations of resp...

Background The aim of the study was to analyze lipid and hormone metabolism, body mass index (BMI), and age parameters in late reproductive stage women in relation to cigarette smoking. Methods The study enrolled 345 healthy late reproductive stage women living in Poland; 13.33% were smokers. The first part of the study assessed lipid metabolism (total cholesterol, high-density lipoprotein [H...

OBJECTIVE To characterise changes in testicular size and reproductive hormones and to investigate the aetiology of delayed puberty and impaired fertility in males with Noonan syndrome (NS). DESIGN In this study, 12 males with NS were longitudinally followed from pre/early puberty until adulthood. Of the 12 males, ten had no medical history other than NS and were divided into two groups, undes...

background: the study was performed to investigate the effects of morphine dependency and morphine withdrawal on the reproductive system of adult male rat(wistar).  methods: 32 adult male rat divided into 5 groups. animals in the control group (n=8) received normal saline (1ml/kg) twice daily subcutaneously for 30 consecutive days. animals in dependent group (n=8) received morphine (10mg/ml/kg)...

Although a large number of studies show that photo-period disruption potentially affects hormone secretion in mammals, information about the effects of circadian photo-period disruption during pregnancy on fetal blood reproductive hormone levels is scarce. This study used ewes and their fetuses to determine the effects of circadian photo-period disruption (deprivation of darkness) on follicle-s...

Socioeconomic status (SES) is a significant sociodemographic correlate of noncontraceptive hormone therapy, yet multiple dimensions of SES have not been examined systematically in previous studies of hormone therapy. This study examined the lifetime incidence of noncontraceptive hormone therapy, how usage varied by type of reproductive organ surgery, and the bivariate and net associations betwe...

Hormones are crucial systemic players and act at different sites of the entire body including the brain. The brain is not only the target of hormone action, but also serves as the “conductor” of the “neuro-endocrine symphony”. Changes in neuronal activity, such as seizures in epileptic patients, may affect hormonal regulation and secretion. In turn, hormones modify susceptibility to develop sei...

objective: oximes are important materials in organic chemistry. synparamethyl benzaldehyde oxime (toloaldoxime) is structurally similar to other oximes, hence we have studied its effects on the neonatal and adult female balb/c mice reproductive systems in order to provide a platform for future studies on the production of female contraceptive drugs. materials and methods: in experimental study,...