Analysis of multiple births in Japan. IV. Body weight of 4,317 twin pairs at one year of age.
D000367:Age Factors; D001722:Birth Order; D001724:Birth Weight; D001835:Body Weight; D005260:Female; D006801:Humans; D007223:Infant; D007564:Japan; D008297:Male; D011247:Pregnancy; D014427:Twins