1. Monitoring of hormone replacement therapy in postmenopausal women by transvaginal sonography and color flow doppler: study in different phases of sequential therapy 
Caterina Exacoustòs, M.D., Stefano Lello, M.D., Elisabetta Caporale, M.D., Maria Carla Minghetti, M.D., Donatella Angelozzi, M.D., Domenico Arduini, M.D., Carlo Romanini, M.D. 
Fertility and Sterility 
Volume 71, Issue 3, Pages (March 1999)
DOI: /S (98)

2. FIGURE 1
Phases of the therapeutic cycle in which transvaginal sonography (TVS) and color flow Doppler evaluation (CFD) were performed. Phase E = estrogen phase; phase E/P = estrogen/progestogen phase; phase 0 = after uterine bleeding, no hormonal treatment.
Fertility and Sterility  , DOI: ( /S (98) )

3. FIGURE 2
Sonogram showing the multilayered endometrium during the estrogen phase (phase E).
Fertility and Sterility  , DOI: ( /S (98) )

4. FIGURE 3
Sonogram showing the echogenic endometrium during the estrogen/progestogen phase (phase E/P).
Fertility and Sterility  , DOI: ( /S (98) )

5. FIGURE 4
Scattergram of the mean (± SD) endometrial thickness and single measurements for each patient before treatment and in the three phases of the therapeutic cycle. Phase E = estrogen phase; phase E/P = estrogen/progestogen phase; phase 0 = after uterine bleeding, no hormonal treatment.
Fertility and Sterility  , DOI: ( /S (98) )

6. FIGURE 5
Mean (± SD) pulsatility index values before treatment and in the three phases of the therapeutic cycle. Phase E = estrogen phase; phase E/P = estrogen/progestogen phase; phase 0 = after uterine bleeding, no hormonal treatment.
Fertility and Sterility  , DOI: ( /S (98) )