Ключевые слова: 21, adult, analysing, biopsy, care, caucasian, checking, clinic, close, computer, device, diagnostic, doctor, echography, embryo, equipment, examination, female, hand, hands, health, holding, horizontal, hospital, machine, medical, medicine, monitor, obstetrician, occupation, people, person, pregnancy, profession, professional, scan, scanner, screen, sonography, specialist, technician, technology, testing, trisomy, ultrasonic, ultrasonography, ultrasound, uniform, up, woman,