Aromatase inhibitors in stimulated IVF cycles

<p>Abstract</p> <p>Aromatase inhibitors have been introduced as a new treatment modality that could challenge clomiphene citrate as an ovulation induction regiment in patients with PCOS. Although several randomized trials have been conducted regarding their use as ovulation inducti...

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Main Authors: Tournaye Herman, Bosch Ernesto, Pados George, Humaidan Peter, Polyzos Nikolaos P, Papanikolaou Evangelos G, Tarlatzis Basil
Format: Article
Language:English
Published: BMC 2011-06-01
Series:Reproductive Biology and Endocrinology
Online Access:http://www.rbej.com/content/9/1/85
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author Tournaye Herman
Bosch Ernesto
Pados George
Humaidan Peter
Polyzos Nikolaos P
Papanikolaou Evangelos G
Tarlatzis Basil
author_facet Tournaye Herman
Bosch Ernesto
Pados George
Humaidan Peter
Polyzos Nikolaos P
Papanikolaou Evangelos G
Tarlatzis Basil
author_sort Tournaye Herman
collection DOAJ
description <p>Abstract</p> <p>Aromatase inhibitors have been introduced as a new treatment modality that could challenge clomiphene citrate as an ovulation induction regiment in patients with PCOS. Although several randomized trials have been conducted regarding their use as ovulation induction agents, only few trials are available regarding their efficacy in IVF stimulated cycles. Current available evidence support that letrozole may have a promising role in stimulated IVF cycles, either when administered during the follicular phase for ovarian stimulation. Especially for women with poor ovarian response, letrozole appears to have the potential to increase clinical pregnancy rates when combined with gonadotropins, whereas at the same time reduces the total gonadotropin dose required for ovarian stimulation. However, given that in all of the trials letrozole has been administered in GnRH antagonist cycles, it is intriguing to test in the future how it may perform when used in GnRH agonist cycles. Finally administration of letrozole during luteal phase in IVF cycles offers another treatment modality for patients at high risk for OHSS taking into account that it drastically reduces estradiol levels</p>
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spelling doaj.art-202c1c7668244ba2b858875e1a5dcd752022-12-22T00:09:37ZengBMCReproductive Biology and Endocrinology1477-78272011-06-01918510.1186/1477-7827-9-85Aromatase inhibitors in stimulated IVF cyclesTournaye HermanBosch ErnestoPados GeorgeHumaidan PeterPolyzos Nikolaos PPapanikolaou Evangelos GTarlatzis Basil<p>Abstract</p> <p>Aromatase inhibitors have been introduced as a new treatment modality that could challenge clomiphene citrate as an ovulation induction regiment in patients with PCOS. Although several randomized trials have been conducted regarding their use as ovulation induction agents, only few trials are available regarding their efficacy in IVF stimulated cycles. Current available evidence support that letrozole may have a promising role in stimulated IVF cycles, either when administered during the follicular phase for ovarian stimulation. Especially for women with poor ovarian response, letrozole appears to have the potential to increase clinical pregnancy rates when combined with gonadotropins, whereas at the same time reduces the total gonadotropin dose required for ovarian stimulation. However, given that in all of the trials letrozole has been administered in GnRH antagonist cycles, it is intriguing to test in the future how it may perform when used in GnRH agonist cycles. Finally administration of letrozole during luteal phase in IVF cycles offers another treatment modality for patients at high risk for OHSS taking into account that it drastically reduces estradiol levels</p>http://www.rbej.com/content/9/1/85
spellingShingle Tournaye Herman
Bosch Ernesto
Pados George
Humaidan Peter
Polyzos Nikolaos P
Papanikolaou Evangelos G
Tarlatzis Basil
Aromatase inhibitors in stimulated IVF cycles
Reproductive Biology and Endocrinology
title Aromatase inhibitors in stimulated IVF cycles
title_full Aromatase inhibitors in stimulated IVF cycles
title_fullStr Aromatase inhibitors in stimulated IVF cycles
title_full_unstemmed Aromatase inhibitors in stimulated IVF cycles
title_short Aromatase inhibitors in stimulated IVF cycles
title_sort aromatase inhibitors in stimulated ivf cycles
url http://www.rbej.com/content/9/1/85
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AT padosgeorge aromataseinhibitorsinstimulatedivfcycles
AT humaidanpeter aromataseinhibitorsinstimulatedivfcycles
AT polyzosnikolaosp aromataseinhibitorsinstimulatedivfcycles
AT papanikolaouevangelosg aromataseinhibitorsinstimulatedivfcycles
AT tarlatzisbasil aromataseinhibitorsinstimulatedivfcycles