Assertion: spontaneous abortion | /r/Synonym | intrauterine fetal demise
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text: The U.S. medical community most often defines miscarriage (also called spontaneous abortion) as the spontaneous loss of a nonviable, intrauterine pregnancy before 20 weeks gestational age (GA), while stillbirth (also called fetal death and intrauterine fetal demise) describes this event at ≥ 20 weeks GA.