Data Analysis
The statistical analyses were performed with SPSS version 25 (IBM Inc.,
Armonk, NY). Data were expressed as the mean ± SD or number
(percentage). Differences in parameters between patients with IVF and
control subjects were analyzed using Student’s t -test for
continuous variables and by the Fisher’s exact test for categorical
variables. Survival curves were constructed by the Kaplan–Meier method
and were compared using the log-rank test. A two-sided P<0.05 was considered statistically significant.