Ovarian vein thrombosis is a rare clinical entity that may present in the puerperium. We report the clinical outcomes of two cases of postpartum ovarian vein thrombosis, incidentally diagnosed at laparotomy in 16‐year‐old and 23‐year‐old females. They had preoperative diagnosis of torsion tuboovarian mass and twisted pedunculated uterine fibroid, respectively. Both patients had transection and ligation of right thrombosed ovarian vein. Postoperative management included a week course of anticoagulant, antibiotics and analgesia. Postpartum ovarian vein thrombosis is a diagnosis of exclusion in the puerperium and a high index of suspicion will reduce associated morbidity and mortality.