1. Reproductive aging and variability in the ovarian antral follicle count: application in the clinical setting 
Karl R Hansen, M.D., Ph.D., Jamie L Morris, M.D., Angela C Thyer, M.D., Michael R Soules, M.D. 
Fertility and Sterility 
Volume 80, Issue 3, Pages (September 2003)
DOI: /S (03)

2. FIGURE 1
The effect of down-regulation with a GnRH agonist upon antral follicle count. Box plot representation before (A) and after (B) GnRH agonist down-regulation. (Wilcoxon signed-rank test, P=.86, n = 20).
Hansen. Variability in antral follicle count.Fertil Steril 2003.
Fertility and Sterility  , DOI: ( /S (03) )

3. FIGURE 2
Interobserver variability in antral follicle count. Each bar graph (A–F) represents the mean observed AF count (with one SD error bars) for six independent ovarian ultrasound videotapes reviewed by six blinded observers. The ovarian ultrasounds were arbitrarily ordered from the lowest to the highest AF count.
Hansen. Variability in antral follicle count.Fertil Steril 2003.
Fertility and Sterility  , DOI: ( /S (03) )

4. FIGURE 3
Intercycle variability in antral follicle count vs. mean antral follicle count. Scatterplot with regression line for the SD vs. mean antral follicle count in infertility patients (n = 50) undergoing two (n = 44) or three (n = 6) IVF cycles within a 1-year interval. Each point represents the mean AF count for a given patient vs. the SD (r = 0.31, P=.029, Spearman correlation coefficient).
Hansen. Variability in antral follicle count.Fertil Steril 2003.
Fertility and Sterility  , DOI: ( /S (03) )

5. FIGURE 4
Stimulation quality in ART cycles vs. mean antral follicle count. Scatterplots with regression lines for mean number of oocytes, mean peak E2, and mean total gonadotropin dose vs. mean AF count (Spearman correlation coefficients).
Hansen. Variability in antral follicle count.Fertil Steril 2003.
Fertility and Sterility  , DOI: ( /S (03) )