The effectiveness of GnRH antagonist in poor ovarian responders undergoing in vitro fertilization a systematic review and meta analysis

In poor responders undergoing in vitro fertilization, the clinical efficacy of a gonadotropin-releasing hormone (GnRH) antagonist was similar to that of a GnRH agonist.

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Authors

Jinsong Xiao , M.D., Shuang Chang, B.S., Shuangyun Chen, M.D.

Volume 100, Issue 6, Pages 1594-1601.e9, December 2013

Abstract

Objective:

To evaluate the effectiveness of gonadotropin-releasing hormone (GnRH) antagonist in poor ovarian responders undergoing in vitro fertilization (IVF).

Design:

Systematic review and meta-analysis.

Setting:

Affiliated hospital with a medical university.

Patient(s):

None.

Intervention(s):

Electronic search.

Main Outcome Measure(s):

Clinical pregnancy rate, number of oocytes retrieved, cycle cancellation rate.

Result(s):

A total of 12 published studies (1,332 cases) were included. Both the stimulation period (mean difference [MD], −0.43; 95% confidence interval [CI], −0.68 to −0.17) and the gonadotropin dosage (MD, −5.41; 95% CI, −7.51 to −3.31) were statistically significantly lower in the GnRH antagonist protocol than in the long GnRH agonist protocol. Both the endometrial thickness (MD −0.45; 95% CI, −0.76 to −0.13) and estrogen (E2) level on the day of hCG administration (MD, −1,299.15; 95% CI, −1,716.34 to −881.95) were statistically significantly lower in the GnRH antagonist protocol than the GnRH agonist protocol. Fewer oocytes were retrieved for the GnRH antagonist protocol than the long GnRH agonist protocol (MD, −0.34; 95% CI, −0.54 to −0.13) or the short GnRH agonist protocol (MD, −0.54; 95% CI, −0.9, 8 to −0.10). The cycle cancellation and clinical pregnancy rates were not statistically significantly different between the two groups.

Conclusion(s):

Compared with GnRH agonist protocols, the GnRH antagonist protocol is associated with fewer oocytes retrieved, lower E2 levels, and thinner endometrium whereas the clinical pregnancy and cycle cancellation rates are similar.

Read the full text at: http://www.fertstert.org/article/S0015-0282(13)02986-5/fulltext


Fertility and Sterility

Editorial Office, American Society for Reproductive Medicine

Fertility and Sterility® is an international journal for obstetricians, gynecologists, reproductive endocrinologists, urologists, basic scientists and others who treat and investigate problems of infertility and human reproductive disorders. The journal publishes juried original scientific articles in clinical and laboratory research relevant to reproductive endocrinology, urology, andrology, physiology, immunology, genetics, contraception, and menopause. Fertility and Sterility® encourages and supports meaningful basic and clinical research, and facilitates and promotes excellence in professional education, in the field of reproductive medicine.

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