LPAR2 and hematoma: Mice lacking Lpar2 are grossly normal, but an increased incidence of perinatal frontal hematoma is observed in Lpar1/Lpar2 double KO (Lpar1−/−/Lpar2−/−) mice compared with Lpar1−/− mice, indicating a modest role of LPA2 in vascular development [9,10].