After adjusting for BMI and age, our results showed that serum prolactin ≤ 20 (ng/mL), serum AMH ≤ 4, secondary infertility, infertility duration < 4 years, and baseline LH/FSH < 1.5 were correlated with a higher prediction of clinical pregnancy in the CC-HCG group. This evidence concerns the gene PLOD1 and Infertility.