I think it's a personal decision to make based on your circumstances. For instance in my case, I have never made more than 1 or 2eggs. The first IVF I did I only had one egg and it wouldn't release, so there was nothing to take out (this is not very common). So definitely one egg is a risk. Of course the more eggs you have the better your chances of having more viable eggs. You are young and have more time to try than me, so if your financial resources allow you to maybe wait? In my case i will turn 40 soon and in my head that is my cutoff...so in my case i am willing to do another ivf with just one egg, even if it means I risk the empty follicle again. If i were younger maybe I wouldn't do it with one except that i know i respond poorly. I am surprised dr Ch said it wasn't worth it, is it maybe your age? He never said anything like that to me with one egg. He wasn't phased in the least nor was dr Cohen.
You are young and age is a good indicator of your potential for success, so you never know if the lone egg is the golden egg. But yes its a gamble. I hope you are able to come to a decision , keep us posted!! Good luck:)