... 脐带杂音 umbilical souffle 脐带真结 true knot of cord 脐头畸形 omphalocephalics ...
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true knot of umbilical cord 脐带真结
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True knot and torsion of cord are cause by occasional factors and difficult to prevent.
脐带异常中脐带真结节、扭转均属偶然因素，难以预防。
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Objective: to determine obstetrical risk factors and pregnancy outcome of fetuses with true knot of the umbilical cord.
目的：探讨脐带真结的危险因素及其妊娠结局。
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