[The recommendations of the Polish Gynecologic Society regarding diagnostic ultrasonography in obstetrics and gynecology].
D005260:Female; D005831:Genital Diseases, Female / Q000000981:diagnostic imaging*; D006801:Humans; D007318:Inservice Training / Q000592:standards; D009313:National Health Programs / Q000592:standards; D011044:Poland; D011247:Pregnancy; D011785:Quality Assurance, Health Care; D016216:Ultrasonography, Prenatal / Q000592:standards*