Final answer:
Ultrasonography is ideal for fetal examination because it provides detailed, non-invasive, and safe imaging, capable of detecting abnormalities and aiding in early diagnosis.
Step-by-step explanation:
Ultrasonography is considered ideal for the examination of a fetus because it fulfills several key criteria that are conducive to fetal monitoring. Firstly, ultrasonography can provide detailed images of the fetus, including 3D imaging, which helps in assessing fetal development and identifying potential abnormalities. Secondly, it is a non-invasive procedure, which makes it safe to use during pregnancy as there is no exposure to ionizing radiation, unlike X-rays. Lastly, the ability of ultrasound to detect changes in density allows it to detect abnormalities in the fetus effectively, aiding in the diagnosis of certain conditions early in pregnancy. Overall, these factors make ultrasonography the technique of choice for studying fetal growth and development.