title: Possible hazards of imaging and Doppler ultrasound in obstetrics.
mesh_terms: D000818:Animals; D000013:Congenital Abnormalities / Q000209:etiology; D004622:Embryo, Mammalian / Q000502:physiology; D005260:Female; D005333:Fetus / Q000502:physiology; D005865:Gestational Age; D006801:Humans; D066298:In Vitro Techniques; D009865:Oocytes; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000009:adverse effects*; D011446:Prospective Studies; D011897:Random Allocation; D014463:Ultrasonography / Q000009:adverse effects*