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  • Title: In-vitro cervical mucus-sperm penetration tests and outcome of infertility treatments in couples with repeatedly negative post-coital tests.
    Author: Farhi J, Valentine A, Bahadur G, Shenfield F, Steele SJ, Jacobs HS.
    Journal: Hum Reprod; 1995 Jan; 10(1):85-90. PubMed ID: 7745077.
    Abstract:
    The results of in-vitro cervical mucus-sperm penetration tests and cross-hostility tests in 178 couples with repeatedly negative post-coital tests were recorded. Using a protocol of three cycles with intra-uterine inseminations (IUI) followed by three cycles with ovulation induction + IUI, the association between the cause of infertility, results of the in-vitro tests and the outcome of infertility treatment was investigated. We found that repeatedly negative post-coital tests are a good indicator of a cervical mucus-sperm penetration problem. The cross-hostility test clearly differentiates the abnormal factor in this interaction, and a good performance of the donors' spermatozoa in the cervical mucus correlates with increased pregnancy rate. In male factor infertility, failure of the husbands' spermatozoa to penetrate cervical mucus was not indicative of a deficient fertilization potential in vivo. In these patients a serious attempt should therefore be made to reverse the infertility by treatment with IUI or ovulation induction + IUI before attempting assisted reproduction. Women with polycystic ovaries and repeatedly negative post-coital tests should be investigated for sperm receptivity of the cervical mucus. Low receptivity of the cervical mucus may imply that endometrial receptivity and oocyte quality are also low. Ovulation induction and not IUI alone should therefore be used as the preferred mode of treatment to improve pregnancy rate.
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