[Ultrasonic observation on early pregnancy in patients using IUD].
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D001208:Asia; D001695:Biology; D055598:Chemical Phenomena; D002621:Chemistry; D002681:China; D003267:Contraception; D003268:Contraception Behavior; D003710:Demography; D003906:Developing Countries; D003933:Diagnosis; D005193:Family Planning Services; D005202:Asia, Eastern; D005835:Genitalia; D005836:Genitalia, Female; D007287:Inorganic Chemicals; D007434:Intrauterine Devices; D008670:Metals; D010808:Physical Examination; D010827:Physiology; D011153:Population; D011157:Population Dynamics; D013193:Stainless Steel; D013812:Therapeutics; D013997:Time Factors; D014566:Urogenital System; D014599:Uterus
D007287:Inorganic Chemicals; D008670:Metals; D013193:Stainless Steel
Asia; Biology; China; Contraception; Contraception Failure; Contraceptive Methods; Contraceptive Usage; Demographic Factors; Developing Countries; Eastern Asia; Examinations And Diagnoses; Family Planning; Genitalia; Genitalia, Female; Ingredients And Chemicals; Inorganic Chemicals; Insertion; Iud; Iud, Unmedicated; Metals; Physical Examinations And Diagnoses; Physiology; Population; Population Dynamics; Size; Stainless Steel; Time Factors; Treatment; Urogenital System; Uterus