41. The audio range falls between 20 ultrasonography and elastography rely on the ultrasonic frequency range. 42. There have been technical advances in ultrasonography . 43. Obstetric ultrasonography , either transvaginally or transabdominally, checks for various markers of fetal sex. 44. Displacement is usually diagnosed using a combination of findings from the rectal exam and ultrasonography . 45. By contrast, studies have shown the value of ultrasonography in diagnosing Hill Sachs lesions. 46. Nevertheless, ultrasonography , which is noninvasive and free from radiation, offers important advantages. 47. Ultrasonography is the preferred method of diagnosis.48. Ovarian cancer screening usually involves ultrasonography of the pelvic region, typically twice a year. 49. She has lobbied for mandatory medical ultrasonography screening before a woman can receive an abortion. 50. Even in rural areas, most women know that ultrasonography can be used for gender discernment.