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Cesarean section in breech or transverse presentation involves more complicated procedures than cesarean section in cephalic presentation because the former requires additional manipulations for guiding the presenting part of the fetus, liberation of the arms, and the after-coming head delivery; therefore, those cesarean sections are likely to be more invasive. Making a rather wide uterine incision to prevent uterine injury during delivery of the fetus facilitates smooth delivery of the fetus. Furthermore, in cases of breech or transverse presentation, it is important to initially identify the presenting part of the fetus and guide it to the incision opening in the lower uterine segment, because delivering the presenting part of the fetus first is a basic rule of delivery of the fetus. Smooth delivery of the fetus by means of breech extraction can prevent excessive stress or injury to the fetus. Therefore, it is important to acquire the knowledge and skills necessary to perform these techniques, including the internal version. Smooth delivery of the fetus is also less invasive for the mother because an extension of the uterine excision or injury to arteries and veins in the uterus and parametrium can be avoided. Incarcerated uterus occurring in cases of pregnancy with intrapelvic adhesion, endometriosis, cervical myoma, or extended cervix may result in excessive uterine and cervical injury when a transverse incision of the lower uterine segment is performed without caution. These conditions may result in difficulty in fetal delivery. Therefore, it is important to identify risks in advance and to choose the incision line with great care. Countermeasures for difficult delivery of the fetus need to be mastered by all practitioners of obstetrics. If the transverse incision fails to reach the uterine cavity, an inverted T-shaped or J-shaped incision should be made. Risks of complications such as injury to the cervical canal, the vagina, the bladder or ureter, and massive hemorrhage must be kept in mind.

Clinical Tips of Cesarean Section in Case of Breech, Transverse Presentation, and Incarcerated Uterus