Hi..., Haemorrhagic ovarian cyst usually result from haemorrhage into a corpus luteum or other functional cyst. . They typically resolve within eight weeks. .. Most haemorrhagic cysts resolve completely within two menstrual cycles (8 weeks). Cysts with a typical appearance of a haemorrhagic cyst should lead to follow-up ultrasound or MRI imaging in 6-12 weeks if: the cyst is > 5 cm in diameter if the patient is pre-menopausal or any size of a haemorrhagic cyst if the patient is perimenopausal  In the postmenopausal patient, surgical evaluation is warranted. A cystic structure that does not convincingly satisfy the criteria for a benign cyst cannot be considered a cyst and should be evaluated with a short interval follow-up US or MRI....