This study examines the influence of socioeconomic circumstances in childhood (childhood SES) and adulthood (adult SES) on timing of first birth by age 37. A longitudinal study of a 1972-1973 New Zealand birth cohort collected information on socioeconomic characteristics from age 3-32 and reproductive histories at 21. 26. 32 and 38; information on first birth was available from 978 of... https://www.moodyasamother.com/product-category/technical-svc/