When should you see a yolk sac

The discriminatory level for a yolk sac with transabdominal ultrasound was a mean gestation sac diameter (MSD) of 20 mm.9 Early TVS described a discriminatory level for the yolk sac of 8 mm.10 More recently Rowling et al.11 found that with 5 MHz transducers the yolk sac is definitively seen by a MSD of 13 mm but with newer 5-9 MHz transducers a yolk sac was definitively seen by the time the MSD was 5 mm. The presence of a larger sac with no evidence of yolk sac formation contained within it is a definitive sign of a non-viable pregnancy (Figure 4.4) In addition an abnormal or hydropic yolk sac is a non-specific sign or 'soft marker' of early pregnancy failure (Figures 4.5 and 4.6).

Figure 4.5 A highly magnified view of a gestational sac in a woman at 6+4 weeks by her LMP. This scan shows a small sac with a large hydropic (8.5 mm) yolk sac. This picture is compatible with intrauterine pregnancy failure.

Was this article helpful?

0 0
My First Baby

My First Baby

Are You Prepared For Your First Baby? Endlessly Searching For Advice and Tips On What To Expect? Then You've Landed At The Right Place With All The Answers! Are you expecting? Is the time getting closer to giving birth to your first baby? So many mothers to be are completely unprepared for motherhood and the arrival of a little one, but stress not, we have all the answers you need!

Get My Free Ebook


Responses

  • morgana
    When should yolk sac be seen?
    8 years ago
  • MATILDA
    Can you see yolk sac with ectopic pregnancy?
    8 years ago
  • raine
    When should i see the yolk sac on a scan?
    8 years ago
  • christopher black
    Can you see a yolk gestational sac with ectopic pregnancy?
    6 years ago
  • Eerik
    Can u see a sac articles on ectopic pregnancy?
    6 years ago
  • Cora Cocci
    When can you see yolk sack?
    5 years ago
  • Costantino Bellucci
    When is the time you see yolk sac on ultrasound?
    2 years ago
  • kerry mcnabb
    Can you see an egg yolk in an eptopic pregnancy?
    2 years ago
  • Kasey
    When is the latest you should see yolk sac?
    4 months ago

Post a comment