thank you for your query.
Firstly, I dont understand what is of no use.
You have not mentioned , what procedure was planned - IUI or something else ?
As per you report, ovulation has occurred.
If you have been sexually active around ovulation, chances of pregnancy
If any ovulation inducting drug was used, then chances of twins are slightly higher.
However, if this was a natural cycle being monitored, then I fail to understand why you are anxious about a twin pregnancy.
Please provide further details for comment.