A 21-year-old nulliparous woman suffering from vaginal haemorrhage in the early second trimester of her pregnancy

A complete hydatidiform co-existing with a live foetus (CMCF) is extremely rare. It is difficult to estimate the incidence of such pregnancies because the diagnosis can only be made by histological examination (1). Pre-eclampsia, hyperemesis gravidarum, vaginal haemorrhage, intrauterine foetal demise and increased risk of persistent trophoblastic disease are the most common complications (1-4). Careful clinical assessment, detailed ultrasound examination and chromosome analysis are essential for prenatal diagnosis. Patients with CMCF may have an increased risk of persistent trophoblastic disease. These pregnancies may have an aggressive biological course even after they have been terminated. The rate of trophoblastic tumours after such pregnancies has been reported to be 50 to 60% (1). However, there is no consensus on the diagnosis and management of such pregnancies. We present here a case of a CMCF who was delivered at 32 weeks of gestation.