Forty-four mothers and thirty-nine fathers were given a questionnaire concerning important development aspects of their children. Included were questions about feeding, weaning, sucking behavior, toilet training, sleeping, motor development, and medical history. Responses to the questionnaires were compared with earlier material given by the parents in connection with a longitudinal study that had been in progress since the birth of these children. The parents were quite inaccurate in their memory of details about child rearing practices and early developmental progress. The largest number of errors dealt with the age of weaning and toilet training, the occurrence of thumb sucking, and demand feeding. The parents also tended to be inexact concerning recommendations of experts in child rearing. The mothers, however, proved to be more correct in remembering than the fathers.