影響人工受孕ㄉ成功率最重要ㄉ男性因素為總活動精蟲數total motile sperm (TMC)

較低的授精 TMC 與活產率降低有關，

較高的 TMC 與較高的活產率相關（TMC 1500-2000 萬（14.8%）相比≤500 萬（5.5%）

而從hCG注射到IUI的時間、精子製備方法和IUI超音波引導與成功率無關。

Intrauterine insemination performance characteristics and post-processing total motile sperm count in relation to live birth for couples with unexplained infertility in a randomised, multicentre clinical trial 

Human Reproduction, Volume 35, Issue 6, June 2020, Pages 1296–1305, 

• lower inseminate TMC were associated with a reduced live birth rate, 
• while time from hCG injection to IUI, sperm preparation method and ultrasound guidance for IUI were not associated with live birth success.
• Time from hCG trigger injection to IUI was not significantly associated with outcome.
•  Higher TMC was associated with greater live birth rate (TMC 15.1–20.0 million (14.8%) compared to ≤5 million (5.5%)) (aRR 2.09 (1.31–3.33)). However, live births did occur with TMC ≤ 1 million (5.1%).
• Higher TMC inseminated leads to an increase in live birth rate up to TMC ~20 million 
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