title: [Secular changes in the mean birth weight in Japan (on the total births, by health center) (author's transl)].
mesh_terms: D001724:Birth Weight; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007564:Japan; D008297:Male; D012737:Sex Factors; D013223:Statistics as Topic; D013997:Time Factors