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  • Title: The evaluation of the sperm migration test as a predictor for success with intrauterine insemination.
    Author: Buckett WM, Luckas MJ, Aird IA, Kingsland CR, Lewis-Jones DI.
    Journal: Int J Fertil Womens Med; 1998; 43(5):257-61. PubMed ID: 9863619.
    Abstract:
    OBJECTIVE: The objective of this study was to prospectively evaluate the sperm migration test (SMT) as a discriminator in couples undergoing intrauterine insemination (IUI). PATIENTS AND METHODS: 261 couples underwent 797 IUI treatment cycles involving gonadotropin stimulation in the three year period. All had a diagnosis of unexplained infertility. All male partners underwent a repeat standard seminal analysis and SMT prior to the female partner undergoing controlled ovarian stimulation. RESULTS: Despite apparently normal seminal analyses before referral, in 22 samples the sperm concentration, motility or morphology were abnormal (WHO criteria). Of these, 20 couples underwent 109 cycles and achieved 2 pregnancies giving a pregnancy rate of 1.8% per cycle and a cumulative pregnancy rate of 10% per couple. From the remaining couples with normal seminal analyses, 71 had an SMT <5 million/mL and 168 had an SMT >5 million/mL. The suboptimal SMT group underwent 276 cycles (3.89 cycles per couple) and achieved 18 pregnancies giving a pregnancy rate of 6.5% per cycle and a cumulative pregnancy rate of 25.4%. The normal SMT group underwent 412 cycles (2.45 cycles per couple) and achieved 60 pregnancies giving a pregnancy rate of 14.6% per cycle and a cumulative pregnancy rate of 35.7%. CONCLUSIONS: We confirm that abnormal seminal analysis leads to poor pregnancy rates with IUI. However, an SMT <5 million/mL despite normal seminal analysis (WHO criteria) also leads to significantly worse pregnancy rates. We would recommend that prior to IUI, couples are screened using the SMT.
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