Figure 4.

The conditional inference tree screened out two variables to predict the outcome of FET: the first was GQR, and the second was EMT. Among the patients with good-quality embryos, the clinical pregnancy (success) rate of FET was approximately 70% when EMT was thicker than 9.6 mm, but 50% when EMT was no thicker than 9.6 mm. For the patients without good-quality embryo, the clinical pregnancy (success) rate of FET was approximately 10%. EMT, endometrial thickness on the day of progesterone treatment; GQR, good-quality embryo rate; success, success of clinical pregnancy; failure, failure of clinical pregnancy.