Ultrasound-guided retrieval of lost intrauterine devices using very fine grasping forceps: a case series.

Aim: To assess the efficacy of a novel ultrasound-guided procedure for the retrieval of intrauterine contraceptive devices (IUDs) when the threads are not visible at the external cervical os ('lost threads').

Methods: This was a prospective cohort study of consecutive women referred for ultrasound examination because of lost IUD threads. The procedures were performed under local anaesthesia in the outpatient setting.

Natural history of ovarian endometrioma in pregnancy.

Background: Ovarian endometriomas are classified as benign ovarian lesions. During pregnancy endometriomas may undergo major morphological changes which are referred to as 'decidualisation'. Decidualised ovarian endometrioma may resemble malignant ovarian tumours on ultrasound examination.