Fig. 1

The nomogram for predicting moderate to severe OHSS with EFLL protocol in fresh single embryo transfer cycle. Points indicate the individual scores corresponding to the five risk factors. Hypothyroid patients (The number 1 represents that the patient has hypothyroidism, The number 0 represents that the patient does not have hypothyroidism); Infertility type (The number 0 represents that primary infertility, The number 1 represents that secondary infertility); Total Points represents the sum of individual scores for the seven risk factors; Risk indicates the probability of incidence corresponding to the total score.