Brain in Love

Oxytocin and vasopressin are likely two of the most important hormones/neurotransmitters involved in the feelings of love and attachment. Both affect the reward system by increasing dopamine release, which gives us a satisfying feeling when we are close to our partners. It seems that oxytocin is more important in women and is more connected with passive aspects of love, while vasopressin, more prominent in males, is important for active aspects of love, such as protecting the partner and children. Although during the early stages of love stress hormone levels are increased, they decrease with the progression of love and are at low levels in couples living in long-lasting relationships. Sex hormones likely have minor roles in feelings of love and attachment. Their primary role is in driving the libido, and high lust is often incompatible with a long-lasting relationship.