Just wondering as a friend recently underwent IVF (ICSI) and was allowed by the clinic to transfer two day 5 blastocysts (she has more frozen) on her first cycle. She's now pregnant with twins. The couple's infertility was entirely male factor according to the tests. I was amazed that the clinic (private) allowed them to transfer two in the circumstances. Interested to know how common or not this is. We did IVF too. Our NHS clinic only allowed one blastocyst on first (successful) cycle. In our case infertility is unexplained. Me and friend did IVF at the same age.