IVF treatment - Chance, choice and destiny !

While the IVF treatment process itself is well-defined, the outcome of an individual cycle is always uncertain - something which seems to be true for most complex biological systems. While we are very good at making embryos in the IVF lab, after we transfer them into the uterus, we have no control over whether or not they will implant.

So what affects the outcome of the IVF cycle ? Is it chance ? choice ? or destiny ? And what intelligent choices can you make to improve your chances ?