Complex sentence: Lupus anticoagulant is actually a prothrombotic agent; that is, presence of Lupus anticoagulant antibodies precipitates the formation of thrombi in vivo.
Split into simpler sentences: Lupus anticoagulant is actually a prothrombotic agent. That is, presence of Lupus anticoagulant antibodies precipitates the formation of thrombi in vivo.