Methods 450 cases of early pregnant women at ASA I-II level,who were not addict to analgesic and without psychological problem,were randomly divided into three groups.

• 方法随机选择450例ASAI-II级无全身性疾病、无镇痛药成瘾史、无精神症状的早孕妇女分为三组；分别给予A组:丙泊酚1.；5mg/kg静注;