Final answer:
Ultrasound imaging around the 36th week of pregnancy is essential for assessing placenta location and fetal development. Advanced ultrasound systems can create detailed 3D images, providing vital density information used for prenatal care. The placenta's function in nutrient delivery and hormone production is also monitored via ultrasound imaging.
Step-by-step explanation:
An ultrasound performed around 36 weeks of pregnancy can provide detailed information about the location of the placenta and the development of the fetus. Ultrasound imaging can reveal remarkable detail using advanced systems, which include 3D imaging. These details are crucial for assessing fetal growth, placenta placement, and any potential abnormalities.
Ultrasounds are the technique of choice for studying fetal growth and development because they can provide density information that is superior to X-rays, without exposing the fetus to ionizing radiation. The intensity of reflected sound from an ultrasound is related to changes in density, making it an effective diagnostic tool for the prenatal period. Furthermore, ultrasound can make use of the Doppler effect to evaluate blood flow within the fetus and mother's body.
During the second trimester, and by 36 weeks, the fetus grows significantly and becomes active, with all organs and structures continuing to develop. The placenta, being essential for delivering nutrients and removing waste as well as producing hormones like estrogen and progesterone, is a focal point in late-term ultrasounds for ensuring the health of both the mother and the fetus.