background: affecting the female reproductive organ and the layers around the oocyst, some ration ions could facilitate the penetration of sperm with specific chromosome type and change the sex ratio in mammal infants. objectives: the purpose of the present study was to evaluate the effect of potassium supplement on the sex ratio in rat. methods: the percentage of moisture, ash, crude fat and p...

The facial width-to-height ratio (face ratio), is a sexually dimorphic metric associated with actual aggression in men and with observers' judgements of aggression in male faces. Here, we sought to determine if observers' judgements of aggression were associated with the face ratio in female faces. In three studies, participants rated photographs of female and male faces on aggression, feminini...

background: infertility is considered as a major health care problem of different communities. the high prevalence of this issue doubled its importance. a significant proportion of infertility have been related to environmental conditions and also acquired risk factors. different environmental conditions emphasized the need to study the different causes of infertility in each area. objective: t...

Monogynous mating systems (low male mating rates) occur in various taxa and have evolved several times independently in spiders. Monogyny is associated with remarkable male mating strategies and predicted to evolve under a male-biased sex ratio. While male reproductive strategies are well documented and male mating rates are easy to quantify, especially in sexually cannibalistic species, female...

BACKGROUND A low female-to-male ratio has been observed in different Asian countries, but this phenomenon has not been well studied among immigrants living in Western societies. In this study, we investigated whether a low female-to-male ratio exists among Indian and Pakistani immigrants living in Norway. In particular, we investigated whether the determination of sex via ultrasound examination...

background: epidemiological characteristics of diabetic foot infection in our region are not clear. the purpose of this study was to determine the epidemiological features of diabetic foot infection in babol, north of iran. methods: from march, 2005 to april, 2010, the epidemiological features of 450 cases of diabetic foot infection treated in two main teaching hospitals of babol medical univer...

background: infertility is a complex issue that affects individuals and groups, and also it has serious implications for the mental and social well-being of those involved. the aim of this review was to assess marital relationship in the context of infertility, using data from infertile individuals or both couples. methods: a literature search was undertaken using multiple databases (medline, p...