Oxytocin (Oxt) is a nonapeptide hormone primarily known for its role in lactation and parturition. It is synthesized in magnocellular neurons of the hypothalamic paraventricular (PVN) and supraoptic (SON) nuclei and is transported to the posterior pituitary for release. Oxt also acts in the brain, modulating various behaviors, including social memory, attachment, sexual and maternal behavior, and aggression. Recent studies suggest that Oxt is involved in human bonding and trust, and its dysregulation may contribute to disorders like autism and schizophrenia. Oxt's functions in social interactions, sexual behavior, and parturition are considered to be specifically facilitative. Oxt is a neuropeptide that is evolutionarily conserved across species and shares structural similarities with vasopressin (Avp). The Oxt receptor (Oxtr) is a G protein-coupled receptor that is expressed in various brain regions, including the olfactory bulb, amygdala, and hypothalamus. Oxt and Oxtr expression varies between sexes, with higher levels typically observed in females. Steroid hormones, particularly estrogen, regulate Oxt and Oxtr expression, influencing behaviors such as social recognition, affiliation, and maternal care. Oxt plays a critical role in social behaviors, including social recognition, affiliation, and aggression. In rodents, Oxt facilitates social memory and recognition by modulating olfactory processing and enhancing social interactions. Oxt is also involved in pair bonding, particularly in monogamous species like prairie voles, where it influences the formation of social bonds and maternal behavior. Oxt's role in maternal care is well-documented, with its effects on maternal behavior being influenced by estrogen levels and the presence of Oxt receptors in key brain regions. Oxt is also involved in sexual behavior, with its effects on erectile function, copulatory activity, and ejaculation in males, and on copulatory behavior in females. Oxt's role in sexual behavior is influenced by interactions with steroid hormones, particularly estrogen, and is modulated by the presence of Oxt receptors in the brain. Oxt's role in social and sexual behaviors is further supported by studies using Oxt and Oxtr knockout mice, which show deficits in social recognition, pair bonding, and maternal care. These findings highlight the importance of Oxt in regulating a wide range of behaviors, from social interactions to sexual and maternal functions. Overall, Oxt is a key neuropeptide that facilitates various aspects of social and sexual behavior, underscoring its critical role in both physiological and behavioral processes.Oxytocin (Oxt) is a nonapeptide hormone primarily known for its role in lactation and parturition. It is synthesized in magnocellular neurons of the hypothalamic paraventricular (PVN) and supraoptic (SON) nuclei and is transported to the posterior pituitary for release. Oxt also acts in the brain, modulating various behaviors, including social memory, attachment, sexual and maternal behavior, and aggression. Recent studies suggest that Oxt is involved in human bonding and trust, and its dysregulation may contribute to disorders like autism and schizophrenia. Oxt's functions in social interactions, sexual behavior, and parturition are considered to be specifically facilitative. Oxt is a neuropeptide that is evolutionarily conserved across species and shares structural similarities with vasopressin (Avp). The Oxt receptor (Oxtr) is a G protein-coupled receptor that is expressed in various brain regions, including the olfactory bulb, amygdala, and hypothalamus. Oxt and Oxtr expression varies between sexes, with higher levels typically observed in females. Steroid hormones, particularly estrogen, regulate Oxt and Oxtr expression, influencing behaviors such as social recognition, affiliation, and maternal care. Oxt plays a critical role in social behaviors, including social recognition, affiliation, and aggression. In rodents, Oxt facilitates social memory and recognition by modulating olfactory processing and enhancing social interactions. Oxt is also involved in pair bonding, particularly in monogamous species like prairie voles, where it influences the formation of social bonds and maternal behavior. Oxt's role in maternal care is well-documented, with its effects on maternal behavior being influenced by estrogen levels and the presence of Oxt receptors in key brain regions. Oxt is also involved in sexual behavior, with its effects on erectile function, copulatory activity, and ejaculation in males, and on copulatory behavior in females. Oxt's role in sexual behavior is influenced by interactions with steroid hormones, particularly estrogen, and is modulated by the presence of Oxt receptors in the brain. Oxt's role in social and sexual behaviors is further supported by studies using Oxt and Oxtr knockout mice, which show deficits in social recognition, pair bonding, and maternal care. These findings highlight the importance of Oxt in regulating a wide range of behaviors, from social interactions to sexual and maternal functions. Overall, Oxt is a key neuropeptide that facilitates various aspects of social and sexual behavior, underscoring its critical role in both physiological and behavioral processes.