transplacental造句

1、There is one reported case of transplacental WNV transmission.
曾有一例西尼罗河病毒经胎盘（从母亲到婴儿）传播的报告。

2、Transmission is by direct and indirect contact, and by transplacental and congenital transmission.
所属病毒通过直接和间接接触传播，或经胎盘和先天性传播。

3、Objective To study the immune reaction of host with transplacental transmission of schistosomiasis.
目的研究日本血吸虫病经胎盘传播宿主的血清免疫反应。