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SUMMARYCaesarean scar pregnancy is a rare type of ectopic pregnancy. The authors present a 24-year-old woman 5 weeks after her last menstrual period. She had a history of a single caesarean section which was followed by a normal vaginal delivery. Ultrasound imaging revealed a pregnancy in her lower segment caesarean section scar. The decision on the choice of treatment was influenced mainly by the β-human chorionic gonadotropin levels in the patient's blood. Although a few reports have been published on similar cases, spontaneous resolution of a caesarean scar ectopic pregnancy of less than 5 weeks gestation is yet to be reported. The patient is now asymptomatic and her urine pregnancy test has been confirmed negative. BACKGROUND

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Introduction: Antral follicle count has been found to be a useful predictor of pregnancy outcome in patients undergoing in-vitro fertilisation (IVF), but the examination using 2D ultrasound is time consuming and consistent results may be difficult to obtain. Objective: To evaluate the usefulness of inversion mode for antral follicle count using the GE 4D View software. Method: 100 patients undergoing IVF were recruited. Antral follicle count was performed on 2 nd day of the menstrual cycle using conventional TV 2D scanning, followed by 3D TV scanning on GE Voluson 730 Pro V ultrasound system. While on conventional 2D scanning, the antral follicles in each ovary were counted and classified into the following groups : (a) less than 4 mm (b) 4-7 mm (c) 8-11 mm. The scanning duration of antral follicle count was recorded. The patient was sent home before analyses of the 3D volume data were carried out. The 3D volume data in the GE Voluson 730 Pro V system was transferred to a CD. Off-line analyses were carried out using the 4D view software in a PC. The inversion mode was utilised on the rendered image, the chroma was set on 'copper' tone. The follicles were counted by rotating along the X and Y axes. They were classified into groupings similar to that done on 2D TV scans. The duration of antral follicle count for each patient using the inversion mode was recorded. Results: With the conventional 2D transvaginal technique, the examination time ranged form 5-10 minutes for each ovary. The timing required for the 3D inversion mode technique was almost the same, but the patient need not be present when the counting was in progress. This significantly reduced the discomfort for the patient and the stress on the sonographer. Conclusion:The inversion mode is a useful tool in antral follicle count. It can be used in any PC installed with GE 4D view. P41.03An obsolete 25-year-old Chinese ring intrauterine device: Applications of three dimensional sonography to determine its presence and location