Fig. 2

Dynamic changes of follicle diameter and hormone levels over time before 72 h within ovulation to ovulation day in selected patients with complete data at all four time point. A-D Box plots describe the follicle diameter and hormone levels at four time points. The bottom line, middle line, and upper line of the box represents the first quartile, the medium, and the third quartile of the variable. Outliers marked by dots that are either 1.5*IQR or more above the third quartile or 1.5*IQR or more below the first quartile. E-H Statistical tables describe the diameter and hormone levels at four time points. The different color in the table indicates that the p value of the two group comparison was statistical significant, while the same color color in the table indicates that the p value of the two group comparison was not statistical significant. The statistical description were presented by median [interquartile range]. I-L Paired line plots describe per individual’s follicle diameter and hormone levels over four time points.72 h: in 72 h before ovulation; 48 h: in 48 h before ovulation; 24 h: in 24 h before ovulation; 0 h: the day of ovulation