为研究甲硝唑对人类致畸发生的危险，作者对妊娠期不同孕月口服甲硝唑治疗后的先天畸形作了病例－对照分析。孕期曾用药物的信息来源是......

Objective: Adverse pregnancy outcome and increased operative deliveries have been reported in women of advanced maternal......

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