African infant precocity and some social influences during the first year.
D000351:Africa, Eastern; D002657:Child Development; D004777:Environment; D005191:Family Characteristics; D005260:Female; D006801:Humans; D007223:Infant; D007360:Intelligence; D008297:Male; D009048:Motor Skills; D012737:Sex Factors; D012959:Socioeconomic Factors