Hyperreactio luteinalis (HL), characterized by bilateral functional multicystic ovarian enlargement during pregnancy and puerperium, mostly occurs in third trimester. As a rare benign disease, HL is usually self-limited. However, some cases are dignosed by unnecessary operation. This is a case report of HL appearing a week after delivery. The patient took a puncture biopsy of ovarian tumor guided by ultrasound to rule out of ovarian malignancy. Without any specific treatment, the disease regressed spontaneously.
Keywords: Hyperreactio luteinalis; enlarged ovaries; ovarian cysts; pregnancy.