The Analysis of Risk Factors for Recurrent Pregnancy Loss and Prediction of Pregnancy Loss Risk

Hematologic features include coagulation indicators, autoimmune indicators, and endocrine indicators.

Ultrasound indices of uterine artery blood flow include endometrial thickness, endometrial artery blood flow parameters , and bilateral uterine artery blood flow parameters.

Demographic characteristics include age, the number of previous spontaneous abortions (including biochemical pregnancies), BMI, fertility history, past disease history, chromosomal status, family and genetic history, etc.