Methods: 200 cases of unmarried pregnant young women randomly selected, who decided to have induced abortions, received epidemiological investigation.
方法：随机抽取要求终止妊娠的未婚女青年200例，进行流行病学调查。
Methods: 200 cases of unmarried pregnant young women randomly selected, who decided to have induced abortions, received epidemiological investigation.
方法：随机抽取要求终止妊娠的未婚女青年200例，进行流行病学调查。
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