Ultrasound examination of the pregnant woman is done in the third trimester to make sure the fetus is not compromised. Ultrasound examination is a noninvasive procedure, meaning, it does not produce any harm to the mother or the baby in her womb.
When the woman does not deliver and has become past due, the fetal well being is monitored using ultrasound and fetal heart beat tracing. The doctor looks for baby’s movement, the water surrounding the baby and few other parameters to decide about the time of delivery. Other reasons for the third trimester ultrasound are: to confirm fetal death in the womb, to identify placental location, to observe the fetus presentation that means to see which part of the baby is presenting at the mouth of the womb. The head of the fetus at the mouth of the womb, is present in 85 percentage of the patients; other types of presentation will be the buttock, legs, or shoulder.
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