英语语法分析

Results: Among the 356 pregnant women, 310 successfully ejected placentae.

结果：310例患者顺利排出胎囊。

AIM To prepare highly purified functional human trophoblast cells from human placentae.

目的建立纯度较高的适于试验研究的人绒毛膜滋养层细胞。

Aim HBV could infect fetus through placentae, which is intrauterine transmission of HBV.

目的HBV可经胎盘引起胎儿感染，此即HBV宫内传播。