Endometrial thickness is an extremely important factor when undergoing ET during the HRT cycle. The traditional treatment for thickening the endometrium has been the oral administration of conjugated estrogens (Premarine(R)). Recently however positive results have been obtained by replacing this treatment with percutaneous absorption of estradiol using estradiol (Femiest(R)).
In this study, we report on 3 cases involving an improvement of endometrial thickness under HRT after changing treatment from oral administration to percutaneous absorption.
Case 1: 37 y.o. patient with ovarian dysfunction. Conjugated estrogens were administered during the HRT cycle. Endometrial thickness at time of ET was only 5.4mm. We therefore cancelled all treatment. We changed to a treatment of percutaneous absorption from the next cycle. After this change in treatment, endometrial thickness increased to 8.0mm. Following treatment, this patient successfully became pregnant.
Case 2: 31 y.o. patient with tubal factor. We administered hMG by step down method; however endometrial thickness at time of ET was only 7.5mm. We therefore cancelled all treatment, changing to percutaneous absorption from the next cycle. After this change in treatment, endometrial thickness increased to 8.8mm. Following treatment, this patient successfully became pregnant.
Case 3: 38 y.o. patient with ovarian dysfunction, partner with male infertility factor. We started administering conjugated estrogens, however the endometrial thickness at ET was only 6.7mm. We therefore cancelled all treatment, again changing to percutaneous absorption from the next cycle. After this change in treatment, endometrial thickness increased to 9.1mm. Following treatment, this patient successfully became pregnant.
The above examples suggest that estradiol percutaneous absorption using estradiol may indeed be a more effective treatment for increasing the thickness of the endometrium during HRT than estradiol oral administration using conjugated estrogens. More study however is necessary to confirm these conclusions.[Adv Obstet Gynecol,59 (2):77-81,2007 (H19.5)]
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