时下,高龄孕妈妈不在少数。高龄生育意味着高风险,避免生下不健康宝宝的重要措施是及时做好产前筛查和产前诊断。1高龄孕妈妈更易生不健康的宝宝一般临床上将预产期时年龄≥35岁的孕妇称为高龄孕妇。随着女性年龄增大,卵巢卵子储备以及卵子质量显著下降,从而使胎宝宝染色体异常概率大大增加。研究发现,高龄孕妇胎宝宝染色体异常发生率可达18.38‰,其中21-三体综合征最常见 Nowadays, there are many elder pregnant mothers. Elderly fertility means high risk, an important measure to avoid giving birth to unhealthy babies is timely prenatal screening and prenatal diagnosis. 1 older pregnant women more likely to be unhealthy baby General clinical expectant period when the age of 35 or more pregnant women as pregnant women. As women age, ovarian egg reserves and egg quality decreased significantly, so that the probability of fetal baby chromosome abnormalities greatly increased. The study found that the incidence of abnormal chromosomes in pregnant women up to 18.38 ‰, of which 21 trisomy syndrome is the most common