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  • Title: Greater implantation and pregnancy rates with vaginal progesterone in intracytoplasmic sperm injection but not in in vitro fertilization cycles: a retrospective study.
    Author: Manno M, Marchesan E, Cicutto D, Zadro D, Favretti C, Tomei F.
    Journal: Fertil Steril; 2005 May; 83(5):1391-6. PubMed ID: 15866574.
    Abstract:
    OBJECTIVE: To compare the effectiveness of vaginal progesterone supplementation with intramuscular supplementation in assisted reproduction cycles. DESIGN: Retrospective study. SETTING: Physiopathology of Human Reproduction Unit, Pordenone, Italy, from July 2000 to June 2004. PATIENT(S): Three hundred and eight-five intracytoplasmic sperm injection (ICSI) procedures (188 with vaginal gel and 197 with intramuscular progesterone) and 373 in vitro fertilization (IVF) cycles (227 with vaginal and 146 with intramuscular progesterone). INTERVENTION(S): Progesterone luteal supplementation: vaginal gel (Crinone 8% 90 mg/day) or intramuscular (Prontogest 50 mg/day). MAIN OUTCOME MEASURE(S): Implantation rates, and total and clinical pregnancy rates. RESULT(S): Higher rates of implantation and total and clinical pregnancies were observed in the vaginal supplemented ICSI subgroup than in the intramuscular one. This difference was observed for all transfers (13.3% vs. 8.8%, 39.8% vs. 23.3%, and 28.7% vs. 18.6%) and for ultrasound-guided transfers (17.2% vs. 9.3%, 49% vs. 27%, and 36.9% vs. 21.1%, respectively). CONCLUSION(S): The vaginal route of luteal supplementation may be better than the intramuscular one, yielding higher implantation rates as well as total and clinical pregnancy rates in ICSI cycles but not in classic IVF treatments.
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