After randomization of subfertile couples with an isolated cervical factor to intrauterine insemination for 6 months or expectant management for 6 months, 26 women (51%) vs. 16 women (33%) conceived, respectively. Of these pregnancies, 22 (43%) vs. 13 (27%) were ongoing (relative risk, 1.6; 95% confidence interval, 0.91 to 2.8). There was one multiple pregnancy in the group that was allocated to intrauterine insemination. This trial suggests a beneficial effect of IUI in couples with an isolated cervical factor. © 2007 American Society for Reproductive Medicine.
Steures, P., van der Steeg, J. W., Hompes, P. G. A., Bossuyt, P. M. M., Habbema, J. D. F., Eijkemans, M. J. C., … Mol, B. W. J. (2007). Effectiveness of intrauterine insemination in subfertile couples with an isolated cervical factor: a randomized clinical trial. Fertility and Sterility, 88(6), 1692–1696. https://doi.org/10.1016/j.fertnstert.2007.01.124