title: Broken Gräfenberg ring incarcerated in para-ureteral space: a rare case of retained IUD accompanied pregnancy.
authors: Ching-Hui
authors: CH
authors: Chen
authors: Hung-Shuo
authors: HS
authors: Liang
authors: Li-Hsuan
authors: LH
authors: Chiu
authors: Cherng-Jye
authors: CJ
authors: Jeng
mesh_terms: D020878:Device Removal; D005260:Female; D006801:Humans; D007434:Intrauterine Devices; D007813:Laparotomy; D008875:Middle Aged; D011247:Pregnancy; D012187:Retroperitoneal Space