Consider that 3 is pretty much 3 times as likely to make twins as 2 (success)

(barring splitting into indenticals of course!). Consider that with two embies, there is one way to make twins. With three embies, either A and B can implant or A and C, or B and C. And twin pregnancies are considerably higher risk than singleton though they are often seen as the holy grail especially among those who have no little ones yet (PS I hope this did not sound condescending but looking back, it does to me. I am not sure how to put it though. Ahhh...change "holy grail" to "desirable outcome"? Just take that part of the sentence out? lol welcome to the inside of my brain.)

I did transfer three donated embryos for several reasons (over 13 yrs old, frozen twice, "picked over" 3 times) and ended up delivering twins at 25w6d, 1 lb 13 oz and 1 lb 14 oz. They spent 4 months in the NICU. I would only transfer two if I were to do it again. Though I am endlessly grateful for my little ones, the suffering they went through in what should have been the tail end of trimester two, the third trimester and beyond...I would not choose that in hindsight. Two, yes, if I were conmfortable with the risk of twins (and naively, I was...didn't know my cervix sucked) but I took a much bigger chance transferring three and my kids suffered for it.