title: [Words and definition of early abortion].
authors.forename: K
authors.initials: K
authors.lastname: Takahama
authors.forename: H
authors.initials: H
authors.lastname: Hoshiai
authors.forename: A
authors.initials: A
authors.lastname: Yajima
mesh_terms: D000028:Abortion, Induced; D001208:Asia; D002965:Classification; D019049:Developed Countries; D003933:Diagnosis; D005193:Family Planning Services; D005202:Asia, Eastern; D005333:Fetus; D005865:Gestational Age; D007564:Japan; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D012098:Reproduction; D012106:Research; D009626:Terminology as Topic; D014465:Ultrasonics
keywords: Abortion, Induced; Asia; Classification; Developed Countries; Eastern Asia; Examinations And Diagnoses; Family Planning; Fertility Control, Postconception; Fetus; Gestational Age; Japan; Pregnancy; Pregnancy, First Trimester; Reproduction; Research Methodology; Terminology; Ultrasonics