EPs recorded their findings as IUP present (presence of yolk sac or ... by radiology ultrasound results during the ED visit or on a subsequent visit, as well as an 8 week follow up phone call ...

The yolk sac functions as nourishment for the developing embryo and can usually be seen by five-and-a-half to six weeks gestational age on a transvaginal ultrasound. Having a gestational sac doesn ...

The fetal pole appears as a thick area alongside the yolk sac ... ultrasound despite getting a positive pregnancy test. The fetal pole becomes visible somewhere between 5 1/2 and 6 1/2 weeks ...