高龄孕妇是否有增加妊娠不良结局的问题得到了关注,因为高龄初产妇的比例不断增加。在1970～1986年间,美国30～39岁初产妇的比例增加了一倍多,40～44岁初产妇比例增加了50％。最近美国妇女一项希望生育的调查表明,上述趋势可能持续存在。教育和职业目标的追求,晚婚和改进的避孕技术被认为是高龄孕妇模式转换的因素。高龄初产妇影响妊娠结局的早期研究提出了与目前研究相矛盾或不一致的结果。与高龄初产妇有关的不良结局包括低出生体 The issue of whether older pregnant women have increased adverse outcomes of pregnancy is gaining attention, as the proportion of older primipara continues to increase. Between 1970 and 1986, the proportion of primipara in the United States between the ages of 30 and 39 more than doubled, while the proportion of primiparous women aged 40-44 increased by 50%. A recent survey of women who want to have children in the United States shows that the above trend may persist. The pursuit of educational and professional goals, late marriage and improved contraceptive techniques are considered as factors in the transition of patterns of older pregnant women. Early studies on the impact of early primipara on pregnancy outcomes present conflicting or inconsistent results with current studies. Adverse outcomes associated with advanced primipara include low birth rates