Mate choice frequently operates differently for males and females as a consequence of male competition for mates. Competitive interactions can alter the fitness payoffs of choice and the realization of preferences under natural conditions, yet the majority of male choice studies still use binary trials that ignore social factors. Here we test the importance of contest dynamics in male choice us...

Fertility awareness-based methods of family planning help women to identify the days of the cycle they should avoid unprotected intercourse to prevent pregnancy. Therefore using fertility awareness-based methods influences the timing of sexual activity, which may affect the nature of the sexual relationship. Data are used from the clinical trials of two fertility awareness-based methods--the St...

abstract background: fertility rate apparently is a non-interventional behavior, but in practice, it is infl uenced by social values and norms in which culture and traditional beliefs play a signifi cant role. in this regard, some studies have shown that gender roles can be associated with reproductive behaviors. with regard to the importance of annual reduction of population growth rate and it...

Exposure to estrogenic endocrine disruptors (EDCs) during development affects fertility, reproductive and non-reproductive behavior in mammals and fish. These effects can also be transferred to coming generations. In fish, the effects of developmental EDC exposure on non-reproductive behavior are less well studied. Here, we analyze the effects of 17α-ethinylestradiol (EE2) on anxiety, shoaling ...

Many scholars have offered structural and ideational explanations for the fertility changes occurring around the world. This paper focuses on the influence of developmental idealism-a schema or set of beliefs endorsing development, fertility change, and causal connections between development and fertility. Developmental idealism is argued to be an important force affecting both population polic...

background and aim: iran has experienced a great variation in women's status in recent years. there is a little knowledge on how and why advancing gender equality and equity and the empowerment of women play a role in recent fertility reduction in the country. this study was conducted to gain insight into the role of gender beliefs and women's empowerment in the couples 'experien...