Effect of prematurely elevated late follicular progesterone on pregnancy outcomes following ovarian stimulation-intrauterine insemination for unexplained infertility: secondary analysis of the AMIGOS trial.

Additional considerations include the higher pregnancy rates in the 1.0 to <1.5 group leading to a decreasing trend as progesterone values were higher, or potentially an effect of impending ovulation causing it to occur prior to IUI in some cases.

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However, these point estimates were imprecise owing to fewer cycles in these categories (54 and 64 cycles, respectively) and did not reach statistical significance.

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