1. Vaginal hematoma during parturition: a population-based study;Saleem;Acta Obstet Gynecol Scand,2004
2. Vulval perineal haematomas in the immediate postpartum period and their management;Morgans;Aust N Z J Obstet Gynaecol,1999
3. Perinatal genital hematomas;Sheikh;Obstet Gynecol,1971
4. Extensive spontaneous retroperitoneal hemorrhage: an unusual complication of heparin anticoagulation during pregnancy;Sherer;J Matern Fetal Med,1999