title: [Changes in the distribution of live birth weight in Japan].
mesh_terms: D000328:Adult; D001724:Birth Weight; D005260:Female; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D007564:Japan; D008297:Male; D011247:Pregnancy; D013997:Time Factors; D014798:Vital Statistics