We used frozen sperm and did ICSI and had a positive.
If your clinic has good success rates transfer two.
I know of several dear ladies who transferred three and had trouble with one or two not making it to the finish line. With twins you have great odds of both making it but put three into the equation and the odds plummet dramatically.
I transferred two when I did the sucessful cycle. We ended up with one.
best wishes to you and good luck