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Human Reproduction, Vol 13, 3315-3318, Copyright © 1998 by Oxford University Press

ARTICLES

Human chorionic gonadotrophin luteal support overcomes luteal phase inadequacy after gonadotrophin-releasing hormone agonist-induced ovulation in gonadotrophin-stimulated cycles

J Penarrubia, J Balasch, F Fabregues, M Creus, R Casamitjana, JL Ballesca, B Puerto and JA Vanrell
Department of Obstetrics and Gynecology, Faculty of Medicine-University of Barcelona, Hospital Clinic i Provincial-Institut d'Investigacions Biomediques August Pi i Sunyer, Spain.

Gonadotrophin-releasing hormone agonist (GnRHa)-induced ovulation after gonadotrophin ovarian stimulation is used to prevent ovarian hyperstimulation syndrome and multiple pregnancy in polyfollicular cycles. However, one of the major problems to be resolved is corpus luteum function after follicular maturation and ovulation by mid-cycle GnRHa administration. The present report investigated the luteal phase in non-conceptual polyfollicular cycles in 26 patients (group 1) receiving a single dose of 0.5 mg leuprolide acetate to induce ovulation and in a control group of patients (n = 26) (group 2) who were given human chorionic gonadotrophin (HCG) (10,000 IU i.m.) for ovulation induction. All of them were normal ovulatory women undergoing gonadotrophin ovarian stimulation because of unexplained infertility or male factor. In both groups of patients two doses of 2500 IU HCG i.m. were given 6 and 10 days after the ovulatory dose of HCG or GnRHa to support the luteal phase. All cycles were ovulatory as shown by mid- luteal serum progesterone concentrations >10 ng/ml. Mean serum progesterone concentrations were 62% higher in group 2 than in group 1, but this difference was not statistically significant. The mean length of the luteal phase was similar in groups 1 and 2. It is concluded that HCG luteal support is a useful tool to overcome the luteal phase inadequacy that characterizes GnRHa-triggered cycles after gonadotrophin stimulation.
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P. Humaidan, H. Ejdrup Bredkjaer, L. Bungum, M. Bungum, M.L. Grondahl, L. Westergaard, and C. Yding Andersen
GnRH agonist (buserelin) or hCG for ovulation induction in GnRH antagonist IVF/ICSI cycles: a prospective randomized study
Hum. Reprod., May 1, 2005; 20(5): 1213 - 1220.
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