A member asked:

At 5 weeks 2 days transvaginal ultrasound only saw gestational sac after ivf. should the yolk sac be visible by that time?

2 doctors weighed in across 2 answers

Generally: The yolk sac is seen when the mean gestational sac diameter is 8mm and a heartbeat at 16mm. You can get the dimensions of the sac from the ultrasound technologist. Best of luck.

Answered 7/31/2015

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Not necessarily: In ideal scanning conditions, ultrasound can show a yolk sac at about 5 weeks. I wouldn't be concerned until after 6 weeks.

Answered 4/25/2013

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