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Nishi-Tokyo-shi, Japan

Honda T.,Umegaoka Womens Clinic | Tsutsumi M.,Umegaoka Womens Clinic | Komoda F.,Umegaoka Womens Clinic | Tatsumi K.,Umegaoka Womens Clinic
Reproductive Medicine and Biology

Purpose To evaluate the pregnancy rate (PR) of unstimulated intrauterine insemination (IUI). Methods This was a retrospective study in a private fertility clinic. Between 2004 and 2013, a total of 4,045 women underwent 17,830 cycles of unstimulated IUI. The etiologies of subfertility in the couples were unexplained (51 %), male factor (36 %), coital problems (9.5 %), and cervical factor (3.5 %). Results The PRs/cycle, between the 1st and 9th trials, in women <35, 35-37, 38-40, 41-42, and >42 years of age were 8.2, 7.3, 5.5, 3.6, and 0.9 %, respectively. In 10,076 cycles in which the male partner had a total motile sperm count ≥5 million, the PRs in the respective age groups were 9.9, 8.6, 6.1, 4.8, and 1.2 %. The largest-sized reported PRs for clomiphene citrate (CC)/IUI in the respective age groups were 11.5, 9.2, 7.3 4.3, and 1.0 % (4,199 cycles in total, Dovey et al., FertilSteril, 2008;90:2281-2286). There were no significant differences in PRs between unstimulated IUI and CC/IUI. Conclusion PR for unstimulated IUI was similar to the reported PR for CC/IUI. Although this was a retrospective study without a control group, to reduce multiple pregnancy rate, we believe that unstimulated IUI is a reasonable treatment. © 2014 The Author(s). Source

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