Dovkav - where in Germany are you?
Our clinic does do PID (pre-impantation diagnostics). It is very expensive and can
only be done on blastocysts.
The clinic apparently has the best reputation in Germany, if not in Europe (according to the research done by a friend of mine).
Have you and DH had chromosome karyotype testing done?
If I think back to how our eggs have fertilised, I think it is quite a risk to try with only one egg!
June 2012 - 14 eggs retrieved, 12 mature, 11 fertilised
September 2012 - 11 eggs retrieved, 10 mature, 7 fertilised
February 2013 - 23 eggs retrieved, 18 mature, 15 fertilised
July 2013 - 12 eggs retrieved, 10 mature, 4 fertilised
December 2013 - 13 eggs retrieved, 11 mature, 9 fertilised
I would say, that we have a pretty good fertilisation rate, yet if you think about it, of the 73 eggs retrieved, 61 were mature (so they could try fertilisation) and of those, 46 fertilised ... 75%. In my eyes that is pretty high and still think of how many eggs could not be fertilised.
So anyway, if you are interested, have a look at BBN https://www.ivf-bbn.de - perhaps that is an option. If you do choose to try it, I would recommend our doctor (who we changed to after the first 5 transfers with a different doctor). I am very happy with his approach and I trust him.