early gestation的用法和样例：
例句
- The women were part of an ongoing maternity cohort who deliered singleton babies and had gien blood samples early in pregnancy.
受试者妇女有部分是正在产科医院中生了单胞胎并在妊娠早期留有血样的产妇。 - These results indicate that renin-angiotensin system may exist independently in human placental villi during early pregnancy.
提示人妊娠早期胎盘绒毛组织可能已存在着独立的肾素一血管紧张素系统。
