1.By monitoring the changing trend of AT, its placenta function, fetal growth, and alert to the occurrence of early occurrence of eclamps can be evaluated.

2.Maternal mothers with low molecular heparin or ordinary heparin anticoagulation can be used to evaluate the efficacy of heparin anticoagulation through AT's activity to protect the expected anticoagulant effects for heparin.

3.Repeated abortions during pregnancy, dead tires or contraceptives, and trapped thrombosis after hormone can be found to find the causes of easily thromellars through the detection of AT, PC, PS and APL.