Clinical applications of ultrasound in obstetrics and gynecology.
D000022:Abortion, Spontaneous; D005260:Female; D005831:Genital Diseases, Female / Q000175:diagnosis*; D005865:Gestational Age; D006801:Humans; D010920:Placenta; D011247:Pregnancy; D011248:Pregnancy Complications; D011271:Pregnancy, Ectopic / Q000175:diagnosis; D011272:Pregnancy, Multiple; D014465:Ultrasonics