The history of longitudinal research: implications for the future.
D002648:Child; D002657:Child Development; D002675:Child, Preschool; D004569:Electroencephalography; D005314:Embryonic and Fetal Development; D005260:Female; D005318:Fetal Heart; D006128:Growth; D006339:Heart Rate; D049673:History, 20th Century; D006801:Humans; D007360:Intelligence; D007361:Intelligence Tests; D009043:Motor Activity; D009765:Obesity; D010553:Personality Development; D011247:Pregnancy; D012106:Research / Q000266:history*; D013016:Sound; D014427:Twins; D014481:United States