Revista Brasileira de Ginecologia e Obstetrícia
versão impressa ISSN 0100-7203
TOGNOTTI, Élvio et al. Half-dose long-acting form of GnRH agonist for pituitary suppression in cycles of in vitro fertilization. Rev. Bras. Ginecol. Obstet. [online]. 2007, vol.29, n.4, pp. 205-210. ISSN 0100-7203. http://dx.doi.org/10.1590/S0100-72032007000400007.
PURPOSE: to evaluate the experience of an assisted reproduction center that uses depot administration of half-dose of GnRH agonist for pituitary suppression in assisted reproductive cycles. METHODS: prospective study that evaluated in vitro fertilization or intracytoplasmatic sperm injection (IVF/ICSI) cycles utilizing half-dose of leuprolide acetate between August 2005 and March 2006. Recombinant FSH was administered for controlled ovarian induction based on the protocol. hCG was administered when at least one follicle reached 19 mm in diameter. IVF or ICSI was performed according to infertility factor. Up to four embryos were transferred on the second or third day after oocyte retrieval. Progesterone supplementation was initiated on the same day of oocyte retrieval, and after 14 days b-hCG was measured. The following parameters were evaluated: number of aspirated cycles, cancelled cycles, transferred cycles, total dose of FSH employed, number of mature oocytes retrieved, fertilization rate, number of transferred embryos, embryo implantation rate, and pregnancy rate. RESULTS: A hundred and nine IVF/ICSI cycles were initiated. The mean age of the patients was 34.9 years. We observed 1.8% of cancellation rate. The mean total dose of gonadotrophins employed was 1,905 IU per cycle. We obtained 86.5% of mature oocytes and the fertilization rate was 76.3%. The mean number of embryos transferred was 2.7. Pregnancy rates per aspiration and per transfer were 25.2 and 25.7%, respectively. Of those who reached pregnancy, 26.3% were twins and 5.3% were triplets. CONCLUSIONS: the half-dose of GnRH depot employed for pituitary suppression was a useful alternative for ovarian stimulation in IVF cycles because it is comfortable and practical for the patient, besides its low cost.
Palavras-chave : Leuprolide [administration & dosage]; Fertilization in vitro; Infertility; Reproductive techniques, assisted; Gonadotropin-releasing, hormone [agonists].