#3monthspregnant #pregnancyultrasound

in 3rd month of pregnancy NB nasal bone is formed, NT scan is  a type of ultrasound done  in pregnancy to see nuchal translucency and nasal bones.

Nuchal translucency is skin fold at nape of baby  which has fluid and Doctor take thickness of this fold. NORMALLY nuchal translucency should be less than 3.5 mm .

Nasal bone is length of nasal bone,  it is absent or reduced in length in chromosomal anomalies as Down syndrome,  Patau syndrome abd Edward syndrome.

NT, nasal bone are two  parameters to detect fetal anomalies .

It is done between 11-14 weeks of gestation.

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