方法选择100例先兆流产患者，随机分为治疗组34例和两个对照组各33例。
Methods 100 cases of patients with threatened abortion were randomly divided into treatment group (34 cases) and two control groups (33 cases each).
方法选择100例先兆流产患者，随机分为治疗组34例和两个对照组各33例。
Methods 100 cases of patients with threatened abortion were randomly divided into treatment group (34 cases) and two control groups (33 cases each).
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