BG, love how you 'tried nice' before DD was born...did it work...lol
not so much!
i gave up when it was the same people all the time - so i got nasty - much more successful

not that i'm really nasty, just blunt
i get a questoin like that my usual answer is
"well, it took 4 years and more rounds of IVF than i care to remember to get this miracle girl, i'm not taking time and money away from her on a maybe, but if you want to be a generous benefactor and pay for unlimited ivf attempts, i'll think about it"