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| Case | Authors | Age (years), gravity, parity | Weeks at diagnosis, findings | Preoperative diagnostic modality | Number of former medical institutions before birth | Preoperative diagnosis | Gestational weeks, sex, birth weight, neonatal outcome | Neonatal abnormalities | Initial operation | Second-look operation |
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| 1 | Kuroda, Aragane, Miyoshi et al. [5] | 34, 0G0P | 37 weeks, intraoperative findings | Not diagnosed | 1 | Bicornuate uterus | 37 weeks, female, 2504 g, alive | Contracture of the right ankle, skull deformity | Extraction of the fetus, extraction of the placenta simultaneously, left salpingo-oophorectomy, blood transfusion | No |
| 2 | Watanabe, Yoshinaga, Takami et al. [6–8] | 29, 0G0P | 37 weeks before the operation | MRI, US | More than 1 | Abdominal pregnancy | 39 weeks, female, 1978 g, alive | Torticollis | Extraction of the fetus, no blood transfusion | Second-look placental resection at 59 days postoperatively |
| 3 | Watanabe, Yoshinaga et al. [6, 7] | 39, 5G1P | 33 weeks, intraoperative findings, transferred soon | Not diagnosed | More than 1 | Not described | 33 weeks, male, 1826 g, alive | Clubfoot | Extraction of the fetus | Second-look placental resection at 84 days postoperatively |
| 4 | Watanabe et al. [6] | 22, 1G0P | 25 weeks, before operation | MRI, US | More than 2 | Abdominal pregnancy | 33 weeks, female, 1765 g, alive | Clubfoot | Extraction of the fetus | Second-look placental resection at 102 days postoperatively |
| 5 | Kajimura et al. [9] | 25, 0G0P | 38 weeks, after IUFD was diagnosed by US | US, insertion of a balloon catheter in the uterine cavity | more than 2 | Abdominal pregnancy | 38 weeks, female, 1929 g, IUFD | Grade 1 maceration (epidermis) | Extraction of the fetus, marsupialization, no blood transfusion | Second-look placental resection at 17 days postoperatively combined with left salpingectomy and partial resection of the uterus |
| 6 | Tamura et al. [10] | 37, 0G0P | 40 weeks, intraoperative findings, transferred soon | Not diagnosed | More than 1 | Breech presentation | 40 weeks, female, 3300 g, alive | None | Extraction of the fetus, extraction of the placenta simultaneously, left salpingo-oophorectomy, drainage, blood transfusion | No |
| 7 | Sekiguchi et al. [11] | 36, 0G0P | 20 weeks, during the operation | Not diagnosed | Tuberculous peritonitis, pregnancy not allowed, first visit at 20 weeks | Not described | 20 weeks, male, 80 g, abortion due to tuberculosis | Not described | Extraction of fetus, extraction of the placenta simultaneously, no blood transfusion | No |
| 8 | Tozawa, Hamada et al. [12, 13] | 34, 1G0P | 38 weeks, intraoperative findings | Not diagnosed | Not described | Total placenta previa | 38 weeks, female, 2850 g, alive | Occipital protrusion, small mandible, short neck, webbed neck, and mild contracture of the elbow joint and hip joint | Extraction of the fetus, extraction of the placenta simultaneously, supravginal amputation of the uterus, blood transfusion | No |
| 9 | Yonei, Tachibana et al. [14] | 46, not described | 21 weeks, during the operation | Not diagnosed | Not described | Uterine cervical fibroids, placenta previa | 21 weeks, sex and weight not described, artificial abortion | Not described | Evacuation of pregnancy and abdominal total hysterectomy were scheduled. Extraction of the fetus, gauze tamponade in the pelvic cavity, abdominal closure, blood transfusion | Second-look gauze extraction at 3 days postoperatively and third-look placental resection at 1 year postoperatively with hysterectomy |
| 10 | Takeda et al. [15] | 25, 0G0P | 42 weeks, intraoperative findings | Not diagnosed | More than 1 | Placenta previa | 42 weeks, female, 3520 g, alive | Left torticollis | Extraction of the fetus, extraction of the placenta simultaneously, left adnectomy, blood transfusion | No |
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