Fetal Medicine FAQs

Q. What is ultrasonography ?

Sonography, or ultrasound, utilizes high frequency sound waves (not x-rays) to obtain diagnostic images. Ultrasound imaging is used to evaluate many parts of the body, including the abdomen, blood vessels, fetus of pregnant women, superficial body structures, and newborn brain to name only a few.

Q. What is the importance of sonography today?

  • Tumors of uterus and ovaries and abnormalities of reproductive organs
  • Maturation of eggs and changes of endometrium in different stages of menstrual cycle
  • Early pregnancy, including entopic pregnancy
  • Development of fetuses and possible malformations of fetuses
  • Position of the fetus, position of the placenta in the uterus and changes in it. It is also possible to estimate the quantity of amniotic fluid, evaluate heart function and breathing movements of the fetus. 

Q. What are the limitations of sonography?

Ultrasound waves cannot penetrate air & bone and hence sonography has limited applications in regions like the skull and chest.

Q. Is sonography harmful?

No harmful effects of sonography are known even on the embryo of the foetus of a pregnant women.

Q. What is Colour Doppler?

Colour Doppler is colour-encoded sonography of the blood vessels. Blood flow is seen in colour. It is like sonography and there is no involvement of any injection of contrast to the mother.

Q. What is 3D sonography?

3D sonography is 3 Dimensional display of the surface of a structure like a foetal face/spine or any other part of the body.

Q. What is endovaginal sonography?

It is sonography done for better visualisation of uterus & ovaries. A high-resolution endovaginal probe is inserted into the vagina for this examination. It is not painful. It is done as a routine at our centre as it is observed the at times  even fairly prominent lesions can be missed if only trans-abdominal sonography is performed. It does nor require a full bladder.

Q. Is dating and weight estimation 100% accurate?

Dating and weight estimation are just estimates based on statistical data of the baby size. It is not 100% accurate but predicts the dating and weight estimation up to +/- 10%.



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