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 is a primitive structure that usually disappears after 20 weeks' gestation ... into amniotic sheets or bands occurring in 0.8% of all pregnancies. Previous scars of the uterus ...
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