Baseline characteristics of participants
No significant differences in age, weight, BMI, gravidity, and history of adverse pregnancy or implantation failure were observed between the two groups, showing the similar demographics and baseline characteristics (Table Demographic and clinical characteristics of the participants at baselineBMI: The body mass index is the weight in kilograms divided by the square of the height in meters. Excepting for the comparison of history of production number performed by the Chi-square test, other statistics were performed by independent samples 