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  • Title: Factors of importance for the establishment of a successful program of intracytoplasmic sperm injection treatment for male infertility.
    Author: Svalander P, Forsberg AS, Jakobsson AH, Wikland M.
    Journal: Fertil Steril; 1995 Apr; 63(4):828-37. PubMed ID: 7890070.
    Abstract:
    OBJECTIVE: To establish an intracytoplasmic sperm injection treatment program for couples with male infertility and to determine those factors important for success. DESIGN: A retrospective analysis of 171 consecutive cycles of intracytoplasmic sperm injection concerning 145 infertile couples. SETTING: Infertility clinic in a private hospital associated with a university hospital. PATIENTS: Couples with infertility in the male partner whose sperm parameters were unacceptable for conventional IVF or in whom fertilization by conventional IVF failed repeatedly. INTERVENTIONS: One hundred seventy-one transvaginal oocyte retrievals were completed after superovulation with GnRH agonist and gonadotropins. MAIN OUTCOME MEASURES: The parameters evaluated included fertilization, cleavage, implantation, pregnancy, and spontaneous abortion in relation to patient indications and improved procedures. RESULTS: After intracytoplasmic sperm injection, normal fertilization occurred in 45% of the oocytes (n = 1,499). Of 171 treatment cycles, 93% of the couples had fertilization and 86% had ET. Thirty-six pregnancies were achieved. During the period studied, the mean fertilization rate increased from 21.3% during the first 17 weeks to 67.8% during the last 13 weeks, and the pregnancy rate (PR) per started cycle increased from 12.8% to 31.3%. CONCLUSIONS: Technical factors critical for achieving high rates of fertilization and pregnancy were the use of standardized intracytoplasmic sperm injection pipettes, the immobilization of sperm before injection, and the aspiration of a minimal amount of ooplasm before reinjection with the sperm. Intracytoplasmic sperm injection appears to be superior to other micromanipulation methods for alleviating male infertility.
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