Considerable evidence suggests that the steroid hormone testosterone mediates major life-
history trade-offs in vertebrates, promoting mating effort at the expense of parenting effort or …

Positive attachment experiences during infancy are linked to positive developmental
outcomes of children later in life. The parent–infant relationship does not start upon the birth …

▪ Abstract Socioendocrinology is the study of the effect of the social environment on the
interactions between hormones and behavior. Individuals have evolved a physiological …

BRIEF COMMUNICATION Page 1 Physiology and Behavior, Vol. 12, pp. 149-151. Brain
Research Publications Inc., 1974. Printed in the USA BRIEF COMMUNICATION A …

In nonhuman primates and humans, similar to other mammals, hormones are not strictly
necessary for the expression of maternal behavior, but nevertheless influence variation in …

Although humans are considered unusual among mammals for the intensity of care that
fathers often provide offspring, little is known about the hormonal architecture regulating …

Theoretical treatments of the relationship between paternity (or certainty of paternity) and
paternal care predict, under certain conditions, that individual males should invest less in …

This chapter considers the phenomenon of human paternal investment in terms of the
benefits of providing care to children and the costs of investment from the males' …

Female mammals have internal fertilization, long gestation, and lactation. These basic facts
of reproductive biology have important social consequences. Internal fertilization …

Male cotton-top tamarins, Saguinus oedipus, display hormonal changes associated with
parenting prior to the birth of their infants. Here we examined the hormonal changes that …