title: [[Analysis of multiple birth rates in Japan]].
abstract: The author analyzes multiple birth rates in Japan based on data from published vital statistics for the years 1951-1968 and from computer files for 1974-1985.  "The higher multiple birth rate since 1974 was attributed to the higher proportion of mothers treated with ovulation-inducing hormones in Japan." (SUMMARY IN ENG)
authors.forename: Y
authors.initials: Y
authors.lastname: Imaizumi
mesh_terms: D001208:Asia; D001695:Biology; D001723:Birth Rate; D003710:Demography; D019049:Developed Countries; D003906:Developing Countries; D004703:Endocrine System; D005193:Family Planning Services; D005202:Asia, Eastern; D005298:Fertility; D005299:Fertility Agents; D006728:Hormones; D007564:Japan; D009099:Multiple Birth Offspring; D010060:Ovulation; D010827:Physiology; D011153:Population; D011157:Population Dynamics; D011247:Pregnancy; D011256:Pregnancy Outcome; D011272:Pregnancy, Multiple; D012098:Reproduction; D012102:Reproductive Control Agents
chemical_list: D005299:Fertility Agents; D006728:Hormones; D012102:Reproductive Control Agents
keywords: Asia; Biology; Birth Rate; Demographic Factors; Developed Countries; Developing Countries; Eastern Asia; Endocrine System; Family Planning; Fertility; Fertility Agents; Fertility Measurements; Hormones; Japan; Multiple Birth; Ovulation; Physiology; Population; Population Dynamics; Pregnancy; Pregnancy Outcomes; Pregnancy, Multiple; Reproduction; Reproductive Control Agents