placental fibrin formation

例句：

1. 1.The placental fibrin formation is a critical process for the development of the fetus.
   胎盘纤维形成是胎儿发育的关键过程。
2. 2. During pregnancy, the placental fibrin formation plays a crucial role in nourishing the fetus.
   怀孕期间，胎盘纤维形成在滋养胎儿方面起着至关重要的作用。
3. 3. The study found that the placental fibrin formation was associated with increased risk of preterm birth.
   研究发现，胎盘纤维形成与早产风险增加有关。