THE PROBABILITY OF PREGNANCY AFTER EMBRYO-TRANSFER IS AFFECTED BY THEAGE OF THE PATIENT, CAUSE OF INFERTILITY, NUMBER OF EMBRYOS TRANSFERRED AND THE AVERAGE MORPHOLOGY SCORE, AS REVEALED BY MULTIPLE LOGISTIC-REGRESSION ANALYSIS

Because the process of conception is affected by many variables, a mul tiple logistic regression analysis was performed to assess (i) the imp act and relative weight of both patient and embryo variables and (ii) their possible effects on the probability of a vital pregnancy after e mbryo transfer, A statistical model was constructed predicting the pro bability of pregnancy after embryo transfer, The variables that contri buted significantly to the predictive value of the model were the age of the patient, the cause of infertility, the number of embryos transf erred and the average morphology score of the transferred embryos, Emb ryo variables appeared to have a significant but modest value in predi cting the probability of pregnancy after embryo transfer, Other variab les, such as the thickness of the endometrium, were found to have no p rognostic value, Moreover, we found that their effect could be explain ed by the variables already included in the model.