Prospective randomized double-blind trial of the correlation between time of administration and antiestrogenic effects of clomiphene citrate on reproductive end organs  Marinko M Biljan, Neal G Mahutte, M.D., Togas Tulandi, M.D., Seang Lin Tan  Fertility and Sterility  Volume 71, Issue 4, Pages 633-638 (April 1999) DOI: 10.1016/S0015-0282(98)00534-2

FIGURE 1 Mean (SE) of (A) FSH, (B) LH, (C) E2 levels, and (D) number of follicles >14 mm between the patients in the study group who had CC administered on days 1–5 of the menstrual cycle (-○-) and the patients in the control group who had CC administered on days 5–9 of the menstrual cycle (-■-). P values represent the differences between the two studied groups on the same day of the menstrual cycle. Fertility and Sterility 1999 71, 633-638DOI: (10.1016/S0015-0282(98)00534-2)

FIGURE 2 The changes in endometrial thickness (A) and pulsatility index (B) expressed as mean (SE) between the patients in the study group who had CC administered on days 1–5 of the menstrual cycle (-○-) and the patients in the control group who had CC administered on days 5–9 of the menstrual cycle (-■-). P values represent the differences between the two studied groups on the same day of the menstrual cycle. Fertility and Sterility 1999 71, 633-638DOI: (10.1016/S0015-0282(98)00534-2)