A new model for ovarian follicular development during the human menstrual cycle  Angela R Baerwald, B.Sc. Hon., Gregg P Adams, D.V.M., M.S., Ph.D., Roger A Pierson, M.S., Ph.D.  Fertility and Sterility  Volume 80, Issue 1, Pages 116-122 (July 2003) DOI: 10.1016/S0015-0282(03)00544-2

FIGURE 1 Follicular diameter profiles for a woman who exhibited two follicular waves during the interovulatory interval as determined by the (A) Identity Method and (B) Non-Identity Method. Note that only follicles that grew to ≥8 mm could be individually identified from day-to-day using the Identity Method. Follicles that grew to ≥6 mm were identified using the Non-Identity Method. (A), Each follicle is represented by a different symbol. (B) ■ = largest follicle, □ = second largest follicle, and * = third largest follicle. Baerwald. Human ovarian follicular development. Fertil Steril 2003. Fertility and Sterility 2003 80, 116-122DOI: (10.1016/S0015-0282(03)00544-2)

FIGURE 2 Follicular diameter profiles for a woman who exhibited three follicular waves during the interovulatory interval as determined by the (A) Identity Method and (B) Non-Identity Method. Note that only follicles that grew to ≥8 mm could be individually identified from day-to-day using the Identity Method. Follicles that grew to ≥6 mm were identified using the Non-Identity Method. (A), Each follicle is represented by a different symbol. (B) ■ = largest follicle, □ = second largest follicle, and * = third largest follicle. Baerwald. Human ovarian follicular development. Fertil Steril 2003. Fertility and Sterility 2003 80, 116-122DOI: (10.1016/S0015-0282(03)00544-2)

FIGURE 3 Day-to-day profiles (mean ± SEM) of the number of follicles ≥5 mm detected (■) and the diameter of the largest follicle of each wave (Non-Identity Method, ○) for women exhibiting (A) two waves (n = 34) and (B) three waves (n = 16) during one interovulatory interval. Asterisks indicate follicle number data overlap. Baerwald. Human ovarian follicular development.Fertil Steril 2003. Fertility and Sterility 2003 80, 116-122DOI: (10.1016/S0015-0282(03)00544-2)