Unit 8 First Tri A&P
first trimester ultrasoundOB/GYN sonographydecidual reactiongestational sacmean sac diameteryolk sacdouble decidual sac signARDMS exam prep
OB/GYN Exam Prep
Unit 8 First Tri A&P
Explore first trimester sonographic milestones including the decidual reaction, gestational sac development, and yolk sac visualization. Understand the significance of mean sac diameter and the double decidual sac sign in confirming intrauterine pregnancy and viability. ARDMS, ARRT, and CCI registry exam preparation.
27:29
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Transcript
27:29 lessonThe decidual reaction appears as a thickened echogenic endometrial stripe around four weeks. Transvaginal ultrasound identifies the gestational sac when Beta hCG levels exceed 1500 to 2000 mIU/mL.
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