Methods: Twenty two fresh dead fetuses and babies were studied by indirect lymphatics injection technique(30% Prussian blue) and observed under light microscope.

• 方法 利用 2 2具胎儿和婴儿尸体的喉标本 ,30%25普鲁士兰氯仿液 ,淋巴管间接注射法 ,显微镜观察。