Secular Changes in the Mean Birth Weight in Japan

Hiroaki Kahyo, Toru Doi, Keiko Higa, Susumu Ohsawa
1977 Nippon Eiseigaku Zasshi (Japanese Journal of Hygiene)  
In this study we investigated the secular trends in the mean birth weight of the single births by prefecture and region, using the vital statistics of the Japanese government, and then compared the mean birth weight of single births with that of total births (including the single and multiple births) reported in the previous paper (Ref. 1).
doi:10.1265/jjh.32.650 fatcat:oup5g5opqzfahghkk3tujcsgn4