Objective To comprehend the level and influencing factors of physical activity in women getting pregnant from in-vitro fertilization & embryo transfer(IVF-ET), and to provide reference for physical activity intervention during pregnancy.Methods A total of 120 women getting pregnant from IVF-ET were selected from obstetrics clinic in three 3A hospitals in Beijing, and physical activity of the pregnant women was investigated by using a self-designed questionnaire and the Danish Physical Activity Scale.Results The energy expenditure of the pregnant women was (29.41±2.02) Mets.The time of rests and light physical activity accounted for 96.84% of the total physical activity time, and energy expenditure during rests and light physical activity accounted for 91.83% of the total energy expenditure. Multivariate analysis showed that the number of fetuses and the number of transplantation were the influencing factors of physical activity during pregnancy.Conclusion Women getting pregnant from IVF-ET mainly resort to rests and light physical activities, and their physical activity level is low. It is urgent to pay attention to them, and strengthen health guidance in order to improve their physical activity level.