Pregnancy rates after double versus single insemination with frozen donor semen

Ninety-nine females (mean age 34 years +/- 1) were seen for therapeutic donor insemination using frozen semen. All patients used over-the-counter urinary ovulation predictor kits, with the insemination scheduled either the day after the positive test (group I; n = 46) or consecutively the day of and the day after the positive test (group II; n = 53). Group I patients underwent a total of 113 cycles of insemination (mean 2.5 cycles/patient). Seven pregnancies were achieved in group I for an overall success of 15.2% and a monthly fecundability of 0.06. Group II patients underwent a total of 100 cycles of therapeutic donor insemination (mean of 1.9 cycles/patient). Twenty-one pregnancies were achieved in this group for an overall success rate of 39.6% and fecundability of 0.21. The estimated cumulative probability of conception (F) for 6 months was 0.32 in group I and 0.78 in group II. These data indicate that the F after therapeutic donor insemination with frozen semen is greater if two consecutive inseminations are performed at midcycle.