PIPKIN is a unique cohort study investigating the early development of foetal and infant neurocognitive function and behaviour, and how the infants social and family environment shapes this development. Beginning in June 2022, a total of 125 participants were recruited from Cambridge (United Kingdom) and surrounding villages via either a maternity hospital or social media and community flyer advertisements. After recruitment, the study involves two antenatal visits at 32 and 24 weeks' gestation, two home visits in the first 2 to 3 weeks after birth, and additional visits at 1 month and 5 months, with a final interview/questionnaire occurring 9 months post-birth. Data collection, for all participants' follow-ups, is due to conclude in March 2026.