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Transvaginal sonographic assessment of the endometrium in spontaneous and induced cycles.

Transvaginal sonography was used and endometrial response patterns of 3 groups of patients (Spontaneous cycles, hMG cycles, and Clomiphene Citrate cycles) were observed based on endometrial characteristics of thickness and texture. All groups demonstrated cyclical changes evident by transvaginal sonography. Clomiphene Citrate cycles showed retardation of endometrial growth during the proliferative phase and delayed endometrial development based on textural patterns. There exists a positive correlation between estrogen levels and endometrial thickness in induced cycles, which is not observed in spontaneous cycles. There were no correlations between hormonal levels of progesterone, FSH and LH, in relation to endometrial characteristics of thickness and texture.