正常食管组织10例、胃组织8例作为对照组。
Normal esophageal tissue(10 cases)and gastric tissue(8 cases)served as the control group.
方法：取重度子痫前期患者15例作为病例组，正常妊娠30例作为对照组。
Methods 15 severe pre - eclamptic women served in a study group and 30 normal pregnant women were allocated to a control group.
方法选择剖宫产后早期妊娠102例，并将同期自然流产后早孕78例和无分娩史早孕妇女129例作为对照。
METHODS 102 women, who had early pregnancies after cesarean section, were compared with 78 women with early pregnancy after natural delivery and 129 women having no birth.
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