Fig. 2From: A Bayesian network model for prediction of low or failed fertilization in assisted reproductive technology based on a large clinical real-world dataTheoretical model diagram of the Bayesian network model. Before the BN structure was established, a theoretical model diagram was developed according to prior knowledge from previous literature and clinical practice on the association between the selected variables. The variables were divided into seven hierarchical layers and were categorized into three subgroupsBack to article page