This UK longitudinal study of families formed through Assisted Reproduction began at the turn of the century and has been following up families with a child born through surrogacy, egg donation, sperm donation from infancy into adulthood. The study took place over 7 phases, when the target child was aged 1, 2, 3, 7, 10, 14 and 20 years of age. All families were headed by two parent heterosexual couples at the start of the study. Data has been collected using interviews, questionnaires and observational assessments. The study is one of the longest follow-up studies of ART families and has shown that ART families function well, and that children in these families are similar to families with a child born following unassisted conception. Publications from this study can be on our publications page.