BACKGROUND Pregnancy is one of the most critical periods in women's lives. Sexual relationships change in this period. Monitoring of uterine contractions has been shown increase in uterine activity after sexual intercourse in pregnant women. OBJECTIVES This study aimed to determine the association of sexual intercourse during pregnancy with labor onset. PATIENTS AND METHODS This cross-secti...

This study applies transactive memory systems (TMS) as the mechanism connecting division of labor with team learning activities. A field study was conducted to verify and refine this framework and to provide potential theoretical explanations for the influences of division of labor at organizational level on its NPD teams’ learning activities. Several propositions derived from this field study ...

In foraging and other productive activities, individuals make choices regarding whether and with whom to cooperate, and in what capacities. The size and composition of cooperative groups can be understood as a self-organized outcome of these choices, which are made under local ecological and social constraints. This article describes a theoretical framework for explaining the size and compositi...

The role of men in hunter-gatherer societies has been subject to vigorous debate over the past 15 years. The proposal that men hunt wild game as a form of status signaling or “showing off” to provide reproductive benefits to the hunter challenges the traditional view that men hunt to provision their families. Two broad assumptions underlie the signaling view: (1) hunting is a poor means of obta...