DescriptionEmbryo at 5 weeks 5 days with heartbeat - annotated.gif
English: An embryo with discernible heartbeat (arrow). It is located in a gestational sack seen as dark. The embryo has a crown-rump length of 3.5mm in a gestational sac with a mean diameter of 11mm, corresponding to a gestational age of approximately 5 weeks and 5 days. The heart rate estimated at 90 beats per minute. A yolk sac is seen to the left of the embryo by the wall of the gestational sac.
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