NOTE-1. The 1946 survey provided only limited information about pregnancy, confinement and the subsequent care of the baby. In order to make a satisfactory study of prematurity the Joint Committee are most anxious to obtain the supplementary information asked for in this questionnaire. Each premature baby has been matched with a mature one of the same sex, the same position in the family and of the same social and economic group. It is hoped that the information asked for below can be supplied for the mature "controls" as well as for the premature babies.