英语语法分析

The objective is to study the relationship between fetomaternal cellular traffic and hepatitis B virus (HBV) intrauterine infection.

目的是探讨母胎细胞转运与乙型肝炎病毒（HBV）宫内感染的关系。

We, therefore, hypothesize that intrauterine infections during pregnancy may have a direct effect upon trophoblast cells through TLRs.

因此我们推论妊娠时宫内感染可能通过TLR受体直接影响了滋养层细胞的功能。

Their offspring has a greater risk for premature delivery, intrauterine growth restriction and recurrence of congenital heart disease.

她们的孩子有较高的早产、宫内发育迟缓和先天性心脏病风险。