3. Data collection and follow-up
Before treatment: pelvic magnetic resonance imaging (MRI) and US examination were performed to record the position and volume of the uterus, and the number, location and volume of UFs. On the basis of FIGO classification[10, 11] , according to the relationship between UFs and myometrium, endometrium and serous layer, UFs were classified into submucosal fibroids, intramural fibroids and subserosal fibroids[10]. The patient’s age, body mass index, marital status, fertility history (pregnancy and parity, history of spontaneous abortion, history of induced abortion, history of spontaneous delivery, history of caesarean section and history of assisted reproduction and future fertility plan) were recorded. All patients completed uterine fibroid symptoms and health-related quality of life (UFS-QOL) score to evaluate symptom severity scale (SSS) and health-related quality of life score (HQOL).
After treatment: the ablation rate of UFs was evaluated by enhanced MRI within 3 days; the volume of uterus and UFs were evaluated by US 3, 6, 9 and 12 months after MWA, and the reduction rate of uterus and UFs were calculated. The time and mode of conception, pregnancy outcome and perinatal adverse events were followed up. According to the follow-up results, the patients were divided into pregnancy group and non-pregnancy group.