Abstract Hydatidiform moles are abnormal conceptions characterised by atypical hyperplastic trophoblasts and hydropic villi. Their incidence is approximately 1 in 1000 pregnancies. The recurrence risk of hydatidiform mole is approximately 1 in 60 in a subsequent pregnancy and 1 in 6.5 in the third pregnancy. In cases with recurrence, the majority of moles are of the same type as that in the preceding pregnancy. Here, we describe the case of a recurrent partial hydatidiform mole after an initial healthy pregnancy. Both pregnancies were evacuated by suction curettage, and the patient was followed by serial monitoring of β-human chorionic gonadotropin levels. Recurrent molar pregnancy is not an indication for chemotherapy, and subsequent pregnancies do not have an increased risk for other obstetric complications. Keywords: Partial hydatidiform mole, Pregnancy, Recurrent molar pregnancy. Introduction Hydatidiform mole (HM) is the most common form of gestational trophoblastic neoplasia and is characterised by atypical hyperplastic trophoblasts and hydropic villi. 1 There are two types of HM: complete and partial. Several epidemiological risk factors for the development of molar pregnancy are recognised, the most important of which appear to be geographical factors and extremes of maternal age. 2 It is also recognised that previous HMs increase the risk of HMs in future pregnancies. 3 Approximately 1.3% to 2% of mothers who have had a molar pregnancy are expected to have a recurrence. 4 However, recurrence in complete molar pregnancy have been reported earlier. 5 Case Report A 28-year-old-woman, gravida 3, para 1, presented to our hospital with abdominal pain and abnormal vaginal bleeding at 9 weeks of gestation. Her menstrual history was regular, and she had a history of partial HM in her second pregnancy. On examination, her vital parameters were normal. There was no clinical evidence of hyperthyroidism. Ultrasound was suggestive of an HM and a live 7-week, 3- Vol. 61, No. 10, October 2011 1016 Recurrent Partial Hydatidiform Mole Aykut Barut, 1 Iker Arikan, 2 Muge Harma, 3 Mehmeet Ibrahim Harma, 4 Figen Barut, 5 Ahmet Coskan 6 Department of Gynecology and Obstetrics, 1-4,6 Department of Pathology, Faculty of Medicine, 5 Zonguldak Karaelmas University, Zonguldak, Turkey. Figure: Ultrasonographic view of partial hydatidiform mole (white arrows). Case Report