Effects of sibling spacing on intelligence, interfamilial relations, psychosocial characteristics, and mental and physical health.
D000124:Achievement; D000293:Adolescent; D000328:Adult; D001721:Birth Intervals; D001722:Birth Order; D002648:Child; D002675:Child, Preschool; D005190:Family; D005191:Family Characteristics; D005260:Female; D006262:Health; D006801:Humans; D007360:Intelligence; D008136:Longevity; D008297:Male; D010287:Parent-Child Relations; D010551:Personality; D011247:Pregnancy; D011248:Pregnancy Complications; D012107:Research Design; D012649:Self Concept; D012737:Sex Factors; D012801:Sibling Relations; D012923:Social Class