Semen parameters and conception rates after intraperitoneal insemination.

OBJECTIVE: To analyze the reproductive outcome in infertile couples which underwent intraperitoneal insemination (IPI). METHODS: We analyzed a series of 216 couples who underwent IPI. Indications for treatment were unexplained infertility in 51 couples and male factor in 165. The 51 couples with unexplained infertility underwent a total of 71 cycles (20 couples underwent a second IPI cycle). The 165 couples with male factor underwent 243 cycles (165 first cycles and 78 second cycles). RESULTS: Out of the 314 cycles performed, a total of 41 clinical pregnancies were observed, with a corresponding conception rate of 13.1%. The values of conception rates for unexplained and male factor infertility were 21.1 (based on 15 pregnancies) and 10.7% (based on 26 pregnancies), respectively. Out of the 41 pregnant women, 26 gave birth to a child, thus the overall livebirth rate was 8.3% (12.7 and 7.0%, respectively, for unexplained infertility and male factor diagnostic subgroups). Considering the couples with unexplained infertility, the conception rates were 9.0, 30.8 and 20.0% for strata of < 5, 5-10 and > or = 10 millions of inseminated spermatozoa. The corresponding values were 6.8, 12.5 and 18.5%, respectively, in couples with male factor infertility (chi(2)1 trend p < 0.05). CONCLUSION: In conclusion, this series provides quantitative estimates of pregnancy rates after IPI in Italian couples with unexplained infertility or male infertility and suggested that the number of motile sperm inseminated is a determinant of pregnancy with this technique.