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This is a typical appearance for the first-trimester brain at the level of the lateral ventricles.  

Typically, the yolk sac resorbs and is no longer visible sonographically by _______ weeks.

In the image, what fetal structure is indicated by #2?  

What measurement is being performed in the image?  

Click on the yolk sac in the image.

A patient presents with a recent positive pregnancy test, spotting and pelvic pain. The image demonstrates which of the following findings?  

The normal direction of flow through the fetal foramen ovale is __________.

Click on the portion of the embryo where you would expect to visualize cardiac activity.

Click on the position you place your obstetric patient in when they are feeling nauseous or light-headed.

Using transvaginal sonography, the yolk sac can be identified as early as week ____ of the pregnancy.