Introduction : the importance of understanding the psychology of twin and triplet relationships / Audrey C. Sandbank -- Twins in utero : temperament development and intertwin behaviour before and after birth / Alessandra Piontelli -- Antenatal and postnatal influences on family relationships / Jane A. Spillman -- Twins and their language development / Kay Mogford-Bevan -- Twins with special needs / Elizabeth M. Bryan -- Meeting the educational needs of pre-school and primary aged twins and higher multiples / Pat Preedy -- The psychology of triplets / Britta Alin Åkerman -- Adolescent twins and secondary schooling / David A. Hay -- Growth and development of twins / John M.H. Buckler -- Personality, identity and family relationships / Audrey C. Sandbank -- The death of a twin / Elizabeth M. Bryan.