The attachment system in adults, theoretically, is an enduring internal working model of relationships shaped by early primary caregiver relationships. (scienceofrelationships.com)
Recognise what promotes, supports and challenges the baby - caregiver relationships during pre -, peri - and post-natal periods and up to the three year developmental period (iaimh.ie)
Bowlby believed that the infant - caregiver relationship characterized the human experience «from cradle to grave», influencing researchers Hazan and Shaver (1987) to take it a step further and apply Bowlby's ideas to adult romantic relationships2. (elitesingles.com)