An analysis of the results of 6139 AI cycles performed on 1001 women during an 18 year period. It combines data from a number of previous studies.
Pregnancy rates per cycle are broken down against the following factors:
- previous pregnancies
- treatment modalities (cervical cap versus IUI)
- medication used for induction of ovulation (none, or clomid, or HCG, or a combination)
- female age
- year of treatment
- consecutive AI cycle effect
- the use of fresh versus frozen–thawed sperm
The study makes the following broad conclusions:
- The average success rate per cycle came to 12.6%
- Previous pregnancy did not seem to increase the odds of success, though this effect could have been present but hidden by other factors
- Ovulation-stimulating drugs did not seem to increase the odds of success, though this effect could also have been present but hidden by other factors
- Success rates show a definite decline with increasing age of the recipient - see the study data for the specifics
- Success rates declined somewhat for recipients who tried for multiple cycles, though the rate always remained over 10% per cycle
- Success rates for frozen + thawed sperm samples were lower than for fresh sperm samples
