Last year her friend died when she could not get a blood transfusion in time.

去年，她的朋友因未能及时输血而去世。

I think one of the major issues is that pregnant women are at increased risk for getting a blood clot either in their leg or their lung.

我认为主要问题之一是孕妇腿部或肺部出现血栓的风险较高。