Abstract
Objective: To investigate cumulative live birth rate (cLBR) per oocyte retrieval in infertile patients aged 40 years and over undergoing their first in vitro fertilization/intracytoplasmic sperm injection cycles and to identify the possible predictors. Methods: A total of 1,613 patients at a university hospital in China from January 2013 to May 2017 were enrolled in this retrospective study. All data for fresh and subsequent frozen-thawed cycles were analyzed. Multivariate logistic regression analysis with stepwise selection of possible predictors for cLBR was performed, and Loess curve was constructed to determine the association between cLBR and the number of oocytes retrieved. Results: cLBR significantly increased with the number of oocytes retrieved and reached up to 75% when > 20 oocytes were retrieved ( P Conclusions: For patients aged 40 years and over, AFC and the number of oocytes retrieved were two key predictors for cLBR and maximization of ovarian reserve exploitation was pivotal to increase the chance of live birth.
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