I am 29 years old and all my results came our normal. I had two follicles of 16 and 15 mm on day 12. Doctor asked me to come on day 15 for scan and hcg injection. But on day 15 we found that 2 of my follciles had ruptured naturally. There was lots of free fluid so they said it had ruptured recently. They did an IUI within 4 hours of the scan. My husband's sperm count was 41 mil with 15% motility. Was this a well timed IUI? When did ovultaion occur? What are my chances?

Summarized question: What is the best time for intrauterine insemination?