Abstract: Objective: To analyze the clinical features of the assisted reproduction complicated with thrombosis，so as to improve the early prevention and treatment for this complication. Methods：Two cases of the assisted reproduction complicated with thrombosis were retrospectively analyzed in our hospital, and the related literatures were reviewed. Results：Forty-three cases of the assisted reproduction complicated with thrombosis were reported in the literatues. The site of embolism was predominantly in the upper extremity，head and neck，but the causes were unkown. Anticogulation with low-weight heparin was beneficial to get good clinical outcomes. Conclusions：There are many high risk factors of thrombosis during assisted reproduction. It is critical to improve prevention and the early treatment for thrombosis.

Key words: Reproductive techniques, assisted, Fertilization in vitro, Embryo transfer, Thromboembolism, Pulmonary embolism, Venous thromboembolism