三体性

Trisomy 21, also known as Down syndrome, is a genetic condition characterized by an extra copy of chromosome 21.
三体综合征，又称为唐氏综合症，是一种因第21号染色体多出一条而导致的遗传病。
The risk of trisomy increases with maternal age due to errors in cell division during egg formation.
由于卵细胞形成过程中的细胞分裂错误，孕妇年龄越大，胎儿出现三体的风险越高。
Prenatal screening tests can detect the likelihood of trisomy in a developing fetus.
产前筛查测试可以检测胎儿是否存在三体的可能性。
In trisomy 18, also called Edwards syndrome, there are three copies of chromosome 18 instead of two.
在18号染色体三体，也称爱德华兹综合症中，存在三条18号染色体而非两条。
Fetuses with trisomy often have congenital heart defects and developmental delays.
患有三体的胎儿通常伴有先天性心脏病和发育迟缓。
Researchers are studying ways to prevent or treat the effects of trisomy using gene therapy.
研究人员正在研究如何利用基因疗法预防或治疗三体的影响。
Individuals with trisomy 13, also known as Patau syndrome, usually have severe intellectual and physical disabilities.
患有13号染色体三体（又称帕陶氏综合症）的人通常会有严重的智力和身体残疾。
Trisomy can be diagnosed through amniocentesis or chorionic villus sampling.
通过羊膜穿刺术或绒毛活检术可以诊断出三体。
Advances in genetic counseling help parents understand the implications of having a child with trisomy.
遗传咨询的进步有助于父母理解生育一个患有三体的孩子意味着什么。
Although most cases of trisomy are not hereditary, families may choose to undergo genetic testing for future pregnancies.
尽管大多数三体病例不是遗传性的，但家庭可能会选择在未来的怀孕中接受遗传检测。