Borderline ovarian tumours (BOT) often affect young females, in whom conservative treatment may be desired in order to preserve fertility. It is unknown whether in vitro fertilisation (IVF) increases the risk of recurrent disease. This case-series will focus on four patients diagnosed with BOT, who were initially treated conservatively and subsequently received IVF. Five recurrences occurred prior to IVF and three recurrences occurred after IVF in three individuals. After a mean follow-up of 104 months after initial conservative treatment and 43 months after IVF treatment, all four patients were alive and disease-free.