但绒毛膜绒毛不能够被用于检测开放性神经管缺损。
The chorionic villi cannot be used to test for open neural tube defects.
接下来，进一步减少TAT的改进措施包括从绒毛膜绒毛或羊水直接取样用于DNA分析。
The next step in improving the current test will include analysis of DNA from direct chorionic villus sampling or amniotic fluid to further reduce the TAT.
如果医生没有在你怀孕前期建议你做绒毛膜绒毛样检的话，你现在需要考虑下做个产前检查了。
If your doctor didn't recommend a CVS test in your first trimester you'll need to consider prenatal testing now.
绒膜绒毛是胎儿绒毛膜上的一种微小的血管凸出物。
A chorionic villus is a minute vascular projection on the fetal chorion.
绒毛膜尿囊由融合的绒毛膜和尿囊组成的富含血管的胎膜组织，存在于爬行类动物和鸟类的蛋壳附近，并且构成大多数哺乳动物的胎盘。
The highly vascular fetal membrane that consists of the fused chorion and allantois found adjacent to the eggshell in reptiles and birds and constituting the placenta in most mammals.
目的：培养纯度较高的人绒毛膜滋养层细胞，为胎盘绒毛在妊娠期间的作用及其机制研究提供细胞学基础。
AIM: To prepare highly purified human trophoblast cells from human placentae at the first trimester of normal pregnancy for further study on the function of human placentae villi.
目的：培养纯度较高的人绒毛膜滋养层细胞，为胎盘绒毛在妊娠期间的作用及其机制研究提供细胞学基础。
AIM: To prepare highly purified human trophoblast cells from human placentae at the first trimester of normal pregnancy for further study on the function of human placentae villi.
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