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Ultrasound screening in the 1st and 2nd trimester

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

Ultrasonography can be used for the following:

  • diagnosis of pregnancy
  • abortion
  • ectopic pregnancy
  • hydatidiform mole
  • multiple pregnancy
  • dating a pregnancy
  • detection of congenital abnormality
  • guidance of invasive procedures

Notes (1):

  • pregnant women should be offered an early ultrasound scan between 10 weeks 0 days and 13 weeks 6 days to determine gestational age and to detect multiple pregnancies. This will ensure consistency of gestational age assessment and reduce the incidence of induction of labour for prolonged pregnancy
  • crown-rump length measurement should be used to determine gestational age. If the crown-rump length is above 84 mm, the gestational age should be estimated using head circumference

Reference:

  1. NICE (2008). Antenatal care

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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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