Abstracts Results We identified 15 confirmed cases of VP. 14 cases were diagnosed antenatally. The median GA at diagnosis was 25+3 weeks. 9 cases were admitted antenatally (duration: 2 days to 5 weeks). None of the admitted cases went into labour. 11/15 cases had elective LSCS and 4/15 had emergency LSCS (2/4 had category 1 LSCS). The median GA at delivery was 37 + 3 weeks. The single undiagnosed case resulted in neonatal death secondary to VP. Conclusions 1. VP is a rare condition. 2. A high

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... oportion of cases were diagnosed antenatally, however there may be cases which were never diagnosed and did not cause adverse events. 3. Further evidence is needed on the necessity and timing of antenatal admission. What is the Optimal DOse Of lOW mOlecular Weight heparin in pregnant WOmen With raiseD Bmi?