The effect of patient and semen characteristics on live birth rates following intrauterine insemination: A retrospective study

Purpose: To identify characteristics of female patients and of semen that w ere associated with live birth following intrauterine insemination (IUI). Methods: Retrospective review of medical and laboratory results from 533 wo men who underwent IUI with partner's sperm from 1993 through 1995. Results: Among 1728 cycles, 116 (6.7%) resulted in live deliveries. Among t he 38 patient and semen variables analyzed, only 3 were associated with suc cessful IUI outcome. female age <37.7 years at the time of treatment (P = 0 .02); the absence of any corrective pelvic surgery (P < 0.001), and postwas h sperm motility (P = 0.006). Couples with none of these three risk factors achieved per-cycle pregnancy rates of 12.4%, Women with two, risk factors (age and pelvic surgery) achieved per-cycle pregnancy rates of 4.6% when sp erm had good postwash motility. No pregnancies were achieved when low postw ash motility was combined with any other risk factor: Conclusions: Advanced female age, poor postwash sperm motility and a histor y of corrective pelvic surgery are significant risk factors for poor IUI su ccess rates. Poor postwash sperm motility in combination with either of the se other two risk factors resulted in,lo successful pregnancies.